CrankyBooks — Investment Property Tools

Four tools for investment property owners who want real information without the usual real estate industry cheerleading. Search listings, analyze deals, estimate mortgage rates, and calculate closing costs — all in one place.

Select a tool below to get started.

Available Tools

Multi-Family Property Finder

Enter one or more ZIP codes and search for 2+ unit investment properties currently listed for sale across Zillow and Realtor.com.

Mortgage Rate Intelligence

Current investment property mortgage rate benchmarks by loan type and property class. Includes payment calculator, lender links, and AI rate analysis.

Closing Cost Estimator

Itemized buyer and seller closing cost estimates by state, property type, and purchase price. Covers all 50 states with state-specific transfer tax data.

Rental Property Analyzer

Enter purchase price, financing, rents, and expenses to get NOI, cap rate, cash-on-cash return, DSCR, and a stress test. Handles straight rentals and owner-occupied multi-family.

About These Tools

Built for working landlords and real estate investors — not first-time buyers looking for encouragement. Rates are market-calibrated estimates. News is pulled live from public sources. Closing costs reflect state-specific data. Nothing here constitutes legal, financial, or investment advice. Verify everything with your lender, attorney, and accountant.