Spreadsheets and automations that actually work.
Tested templates and n8n workflows for landlords, freelancers and small teams, plus free tutorials that show exactly how they're built.
Products
Landlord Tenant Toolkit
Rent ledger with automatic late fees, move-out inspection to security deposit itemization, tenant screening, turnover cost and a maintenance log.
Rental Property Tracker
Income, expenses, rent roll, deposits, mileage and a Schedule E summary for up to 10 properties.
Lease Renewal Tracker
Upcoming lease end dates, proposed rent bumps, 30/60/90-day windows and a Monday pipeline.
Rental Deal Analyzer
Compare 3 rentals: cash flow, cap rate, cash-on-cash, DSCR, 10-year IRR and sensitivity tables.
Rental Calculator Pro
Downloadable browser app that works offline: 10-year projection, IRR, max-offer price finder, saved deals, side-by-side comparison and CSV export.
Free Rental Cash Flow Calculator
Free (or pay what you want) one-deal spreadsheet: cash flow, NOI, cap rate, cash-on-cash, DSCR, GRM, 1% rule and break-even occupancy.
Short-Term Rental Analyzer
Airbnb/VRBO underwriting: 3 scenarios, cash flow, cap rate, DSCR, break-even occupancy and an ADR x occupancy grid.
Freelancer Finance Tracker
Invoices, partial payments, AR aging, quarterly tax set-aside and a Schedule C summary.
Freelancer Mileage Log
IRS-ready trip log with 2026 H1/H2 standard mileage rates and a Schedule C Line 9 total.
Invoice Chaser for n8n
Polite 3-step overdue-invoice reminders from Google Sheets, with dry-run mode on by default.
n8n Production Self-Hosting Kit
Docker Compose + Postgres 17 + HTTPS, with encrypted backups, a restore drill and safe upgrades.
n8n Reliability Workflow Pack
Error alerts with dedupe, GitHub and disk backups, uptime/SSL monitor and a weekly failure report.
Bundles
- Landlord Spreadsheet Bundle · $27
Rental Property Tracker, Rental Deal Analyzer. $34 bought separately (save $7).
- Freelancer Money Bundle · $22
Freelancer Finance Tracker, Invoice Chaser for n8n. $27 bought separately (save $5).
- n8n Production Bundle · $49
n8n Production Self-Hosting Kit, n8n Reliability Workflow Pack, Invoice Chaser for n8n. $60 bought separately (save $11).
- Complete Bundle (all 6 core products) · $69
Rental Property Tracker, Rental Deal Analyzer, Freelancer Finance Tracker, Invoice Chaser for n8n, n8n Production Self-Hosting Kit, n8n Reliability Workflow Pack. $109 bought separately (save $40).
Free tools
Free Rental Property Calculator: Cash Flow, Cap Rate, Cash-on-Cash, DSCR
Instant rental deal math in your browser: monthly cash flow, NOI, cap rate, cash-on-cash return, DSCR, GRM, 1% rule and break-even occupancy.
Open toolFree IRS Mileage Deduction Calculator (2026)
Business, medical and charity standard mileage rates for 2026, including the mid-year business rate change (72.5¢ → 76¢ on July 1). Trip or full-year mode. Runs in your browser.
Open tooln8n Docker Compose Generator (Postgres + HTTPS)
Generate a production docker-compose.yml, .env with a strong encryption key, and Caddyfile for self-hosting n8n 2.x. Runs entirely in your browser.
Open tooln8n Workflow Checker: Pasted Secrets, Open Webhooks, Silent Failures
Paste an n8n workflow JSON to find pasted API keys, webhooks without auth, missing error workflows, swallowed errors and pinned data. Runs in your browser.
Open toolBank CSV Categorizer for Schedule E and Schedule C
Turn a bank or card CSV into categorized rows for landlord (Schedule E) or freelancer (Schedule C) spreadsheets. Runs in your browser; nothing is uploaded.
Open toolLatest tutorials
- How to Build an Accounts Receivable Aging Report in Excel or Google Sheets
Days overdue, aging buckets (Current, 1-30, 31-60, 61-90, 90+) and a per-client aging summary, using three formulas.
- How to Back Up n8n Properly: Database, Encryption Key and a Restore Test
Exporting workflows isn't a backup. What an n8n backup must contain, the exact commands (tested on n8n 2.40.6 with Postgres), and how to prove it restores.
- Cap Rate vs. Cash-on-Cash vs. DSCR: A Worked Rental Example
The three numbers that decide whether a rental is a deal, calculated step by step on one real-looking property, with a free calculator.
- Freelancer Taxes: A Simple Set-Aside Method and the 2026 Quarterly Due Dates
How much to move to a tax savings account each month, how the IRS estimated-tax periods really work (they are not calendar quarters), and a spreadsheet to track it.
- How to log business miles for Schedule C (2026 IRS rates)
Keep an IRS-ready mileage log for self-employed Schedule C Line 9, with the 2026 mid-year rate change from 72.5¢ to 76¢ on July 1.
- Lease Renewal Tracker Spreadsheet: Lease Expiration Alerts, Notice Deadlines and Rent Increases (Excel & Google Sheets)
Build a landlord spreadsheet that flags leases expiring in 30, 60 and 90 days, works out the last day to send a renewal or rent-increase notice, and calculates each proposed rent bump. Exact formulas, tested by recalculating a sample workbook.
- n8n Error Alerts That Don't Spam You: Error Trigger + Dedupe (n8n 2.x)
Set up one error workflow that alerts Slack, Discord, Telegram or email whenever any workflow fails, groups repeated errors, and actually fires in n8n 2.x.
- Polite Overdue Invoice Reminders: A 3-Stage Sequence That Gets Paid
Copy, timing, and a days-overdue formula for friendly, firm, and final invoice follow-ups — plus how to automate them without spamming clients.
- Rent Late Fee Calculator Spreadsheet: Grace Period, Flat + Daily Fees and a Cap (Excel & Google Sheets)
Build a rent ledger that works out days late, the late fee (flat, percent of rent, daily, with a maximum) and the balance for every charge, and flags LATE automatically. Exact formulas, tested by recalculating a sample workbook, plus how to set the grace period to match state rules like Colorado, New York and Texas.
- Build a Rent Roll That Flags Late Rent Automatically (Plus a Deposit Ledger)
Spreadsheet formulas for a rent roll that shows Paid, Partial, Due and LATE for each unit, and a security deposit ledger that always balances.
- How to Track Rental Income and Expenses by Schedule E Line (Free Spreadsheet Method)
A simple spreadsheet setup that sorts every rental transaction into its Schedule E line automatically, with the exact SUMIFS formulas.
- Rental Property Cash Flow Spreadsheet: Monthly NOI and Cash Flow per Property (Excel & Google Sheets)
Build a landlord spreadsheet that shows income, operating expenses, NOI and cash flow for each rental by month, with the exact SUMIFS formulas. Tested in Excel-compatible LibreOffice and Google Sheets syntax.
- Self-Host n8n with Docker Compose, PostgreSQL and Automatic HTTPS (2026 Guide)
A production-grade n8n 2.x setup on one small server, with Postgres 17, Caddy for HTTPS, a pinned version, and the three settings that trip people up in n8n 2.x.
- Short-Term Rental Calculator Spreadsheet: Airbnb Cash Flow, Break-Even Occupancy and Nightly Rate (Excel & Google Sheets)
Build an Airbnb/VRBO deal analyzer that works out gross revenue, NOI, cash flow after the mortgage, cash-on-cash, cap rate, DSCR, RevPAR, and the occupancy and nightly rate you need to break even. Exact formulas, tested by recalculating a sample workbook in LibreOffice and checking it against an independent model.
- How to Update Self-Hosted n8n in Docker Compose Without Losing Data (Tested 2.40 → 2.41)
The safe way to upgrade a self-hosted n8n: pin the version, back up the database and encryption key, pull, verify, and roll back properly. Every step tested in a real upgrade drill.
How we build things
Every spreadsheet is recalculated and checked against an independent calculation before release. Every n8n workflow and script is run end to end in a real n8n 2.x install; the Self-Hosting Kit was tested by deleting all data and restoring it. We use AI assistance to build and write, and we say so. We only publish what passes the tests.