Can they prove how long it takes to rent a vacant property?

Especially with Bitcoin, people on BP are so quick to prove how right they are rather than have a debate and learn. 

I was about to open a cleaning business in an area that caters to STRs, but finding reliable cleaners proved to be quite a challenge.

My approach is that if something would be hard to prove then it's hard to enforce, so why require it?

The only time you would have to prove it is your personal residence if you got audited.Driver's license, voting registration, passport etc all prove residence. 

Oxford House (https://oxfordhouse.org) is the biggest "peer run" sober living home nonprofit organization in the world, they lease about 3,600 homes nationwide and is a good model to study as well.

And I am under contract with my wholesaler.however your not under contract with the owner.. so I think you are in no mans land and if it was sold bought vastly under-market I think the seller will prevail if they can prove they were lied to about true value 

I'm a University of Maryland student studying business and about to go into my senior year.

If you do, you have to prove it. 

Hey Jimmy,2x Los Angeles house hacker here (and a case study in the BP book, The House Hacking Strategy).In terms of age, it can make a difference but it comes down to what work has been done.