Some common names you'll see thrown around a lot: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend you search for each of those apps online and see what they offer, how much they charge, etc.

The pre-app and early agency feedback you’re describing are often where the theoretical yield starts to get grounded in reality.What I’ve found is that the value of that early work isn’t just confirming unit count, it’s also helping developers/builders understand where the risk actually sits and how to price or structure around it.

How you organize it (app, spreadsheet, paper, memory?)

I'm just looking for a good app that can help me record receipts and expenses, help me management income. 

I would love some feedback on whether there is anything I should focus more on or less on and what are the best sites/apps, free or otherwise, to find this data.

Hospitable saves me so much time and headache from juggling multiple different listing apps. 

The app matters less than tagging, tracking, and staying in front of owners.Agents / pocket listings:Pure relationship game.

Alternatively, maybe build for QB's app store?

How you organize it (app, spreadsheet, paper, memory?)

There’s a newish app available for this.