For one gut at a time, a spreadsheet plus a shared photo folder plus a written scope of work covers most of it, and plenty of operators running two or three jobs a year never buy anything else. The scope of work is the document that matters. It's a line by line list of every task and material with quantities, and it's what you send to three GCs so their bids are comparable. That one file prevents more overrun than any subscription.
When people do buy software, it tends to be builder project management platforms with scheduling, selections and change order tracking, commonly quoted from around 100 a month at the low end up to several hundred for the tiers that include client portals and budgeting. Deal analysis subscriptions aimed at flippers usually sit in the tens of dollars a month. Takeoff and estimating software is really for people bidding work, so as an owner you rarely need it. Prices move, so check current pricing directly.
The costs that surprise people are the one-offs. A structural engineer letter for a wall removal, an architect or drafter for permit drawings if you're changing layout, permit fees themselves, a sewer camera scope, a lead or asbestos survey on a pre-1978 house before demo, lender draw inspection fees each cycle, and dumpster pulls on a gut that can run several loads. Those together often land in the thousands rather than the hundreds.
One overhead line you'd otherwise miss: someone has to be at the property. Whether that's your time or a paid project manager, put a number on it, because it's the cost that decides how many jobs you can run at once.
