June 1, 2026
A saved scenario is how you argue with us
Our assumptions are on the page so you can replace them. Saving the replacement is what turns a disagreement into a comparison.
Nora Feldman
June 1, 2026 · 1 min read
Every figure on a Datum listing sits on assumptions -- the rent, the vacancy rate, the reserve, the management fee, the rate you would borrow at, the deposit you would put down. All of them are ours, all of them are printed, and all of them are wrong for somebody.
So change them
The fields are editable on the property page. Put in your own rate, your own deposit, your own view of what the house rents for. Every figure recomputes -- cash flow, cap rate, cash on cash, DSCR, break-even, the projection.
That much is obvious. The part that gets missed is what to do next.
Save it
A saved scenario keeps the whole set of assumptions under a name you choose, on that property. Three things follow from that, and they are the reason the feature exists:
- It is still there next week. The version of this deal where you put 30% down does not have to be retyped every time you come back to it.
- It sits beside ours. The listing keeps showing the Datum assumptions; your scenario is a second reading of the same house, not a replacement for the first.
- It is comparable. Apply the same scenario to another property and the two are being judged by one standard -- yours -- rather than by ours.
What to save
The ones worth keeping are usually not the optimistic ones.
- Your actual financing, from a lender who has actually quoted you.
- The pessimistic rent. Not the estimate, the number you would still be comfortable at.
- The expensive year. Turnover, a leasing fee, and six weeks empty.
A property that still works in the third scenario is a property you can buy without watching it.
We would rather be argued with on the page than agreed with in the room.
