If it is someone you know you can give them a straight return as if its a loan - can provide a lower interest rate to provide upside - it really depends on the lender and what are they concerned with and what is their risk profile. 

The more you talk about what you want, the more likely someone is to bring you that deal.

Keep in mind, I do my homework extensively on the properties I am trying to buy at auction.

Quote from @Phillip Austin: There are two alternatives to a security deposit, which I speak about in my book.

Quote from @Maurice Nkonsissie: HelloMy name is Maurice, I live in the greater DMV area.

I would google commercial real state firms in the areas you are looking for. 

Quote from @Collin Hays: I don't manage short-term any more, but can't you include this in a written rental agreement that the guest signs at the time of booking?

This is a great question! 

Mainstream homeowner policies won't cover sober living because they don't account for the risk of multiple people recovering in the same home

We also have programs that can close in 3 days or less if you need speed.