They will forget years of good treatment in a minute. 

All equity.I forget the exact amounts, but I think on the equity,  I (we, really, because it was my wife and me) put in 50% of the equity and had an investor that was a close friend put in the other half.  

(forgetting to log, categorizing activities, proof for audit, etc.)I’m even considering building a dedicated software/app that makes this easier.Before I dive into it, I’d love to know if there's a real demand and what features would be must-have vs. nice-to-have?

The latter includes persons on Medicare or Medicaid (I forget which is which) - and they even sometimes pay landlord bonuses.

Remember a rehab on TV takes 60 minutes but even with a team, minutes turn into months and your profit can go out the window in no time. 

Also, don’t forget the tax shift—STRs follow different rules than long-term rentals.

This sets the tone for getting a sold sign in the yard for the house, and getting to the next flip. 

If we also want to make repairs and improvements on rental properties (flooring, drywall, bathroom/roof work, or replacing window      units with mini splits), is there a way to structure things so those expenses reduce our tax burden?

Funeral Home.Would make an offer for $700,000 with a 3 day window.  3 value add plays:a. 

Sounds logical, however they forget that there are many players out there that do not play fair...