3) What app docs will you ask for?

If the complaints are unfounded: Hopefully the threats/extortion was sent in the Airbnb app.

Every system you try will have flaws, or you may salivate over a feature that appears in other software.Some familiar names are mentioned frequently: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend conducting thorough research on each app online to understand their offerings, pricing, etc.

It has a tenant facing portal where tenants can pay their rent, which the app deposits into our account the next business day (even though ACH payments do not regularly settle for 4 days!).  

and they even have an app.

Have you heard of Rent App and is that a good idea (instead of Venmo) and sufficient for tracking rent payments?

Much depends on what you give the CPA...........is it a shoebox full of paper or did you fill in their app?

I am at the point to where I want to purchase, but I am having trouble with finding commercial or residential property listed the one app I once used does not work any more.

I've been using the underdeveloped app.

We do complete kitchen and bath renovations and re-designs often down to the studs which far exceeds a typical turnover renovation where you'd maybe do minor repairs, paint and lay floor.I think I could probably manage 200+ units using Buildium property management software (or some other full featured app) without breaking a sweat.