01
Bring the property
Enter the asking price, expected rents, and property taxes for the duplex or fourplex you’re considering.
PROPERTY
A HOUSE-HACKING TOOLKIT FOR FIRST-TIME BUYERS
Know the numbers before you house-hack.
Make sense of a duplex or fourplex before you make an offer. Put the rent, taxes, and loan assumptions in one place—and see what they mean for your monthly cost and cash to close.
Built for the first property you plan to live in.
BUY WITHOPEN
EYES
EYES
DEAL WORKSHEET2–4 units
A clearer first look
One property.
The whole picture.
Asking priceAdd listing price
Expected monthly rentsAdd rent estimates
Property taxesAdd annual taxes
Financing assumptions
Estimated monthly housing costWaiting on your inputs
Estimated cash to closeWaiting on your inputs
Estimates use the assumptions you provide.
01 / 03Start with the listing
LESS GUESSWORK. MORE CONTEXT.See what goes into a deal review
01 THE IDEA
A rent estimate is only
one part of the story.
House-hacking math gets real when you account for the price, financing, property costs, and the rent you actually expect. Keyspindle helps first-time buyers bring those pieces together before a big commitment.
Clear inputs.
Inspectable estimates.
Inspectable estimates.
02 HOW IT WORKS
THE MATH, MADE LEGIBLE
Three steps from listing
to a more informed look.
Start with the details you know. Make every assumption visible before you rely on the estimate.
02
Make the assumptions yours
Add the loan type and the details behind your estimate, like rate, down payment, insurance, and closing costs.
FINANCING & COSTS
03
See what to look into
Review estimated monthly housing cost and cash needed at closing, with the inputs that shaped them in view.
YOUR ESTIMATE
Estimates are only as useful as their assumptions. Confirm loan terms, property condition, and local costs with the right professionals.
03 BEYOND THE CALCULATOR
MEMBERSHIP DETAILS
One clear offer
for your first
house-hack.
See the single monthly membership offer, what is available before payment, and the limits of what this app currently provides.
See launch membershipYour account
Create and verify your account before starting checkout.
Private workspace
Your personal workspace is available before payment.
Verified membership
Membership status appears only after a paid subscription is verified.
One monthly offer
$34 USD per month, with no free tier or trial.
Deal analysis, reviews, state guides, checklists, and community access are not available in this app yet.
04 GOOD TO KNOW
Before you run the numbers.
What properties is Keyspindle for?
Keyspindle is designed for first-time buyers evaluating owner-occupied duplex and fourplex properties in the U.S.
Does the estimate tell me whether to buy?
No estimate can make that decision for you. Keyspindle helps organize the inputs and costs so you can ask better questions and decide what deserves a closer look.
What should I verify outside the estimate?
Confirm financing with a lender and investigate the property, rents, taxes, insurance, repairs, and other local costs before making a decision.