Are you a licensed real estate agent, @Sam? Or do you have access to the MLS? (In our state, property managers have to be licensed real estate agents.)
If you DO have access to the MLS, you can see how many houses have been sitting on the market, vacant, waiting to be sold.
I would reach out to those owners, explain ABB to them, and RENT their properties from them for three months. Only three months so that they can still sell it.
You want to be the one to rent the house so that you're not in breach of the third-party issue.
You want the calendar to only extend to three months so that you can unlist the house once it goes under contract but still be able to honor bookings within that three-month window.
Where you're going to have major headaches is that agents and the owner will still want to show the house and you may have guests staying there who have a reasonable expectation of privacy. I could see this being your biggest problem.
If you could convince a seller to take his house off market for a few months, then you may have better results but you have the be the tenant with a rental agreement or lease that gives you exclusive rights to sublease.
I am not an attorney and I am not giving you legal advice so you have to check your state's laws but this is the gist of it from the perspective of a real estate agent.
Good luck to you!