Just be patient and wait for a deal in a better area, or don’t buy at all to prevent losing money from D properties.

Is there an Arizona law that prevents this?

I want more passive income, I want the advantages to future financing that @Jerry Padilla referenced, and I believe that the renting it out on Airbnb is inviting a whole host of potential problems that one quality set of tenants prevent.

Lastly, as I'm building my own list too, I'd second that it seems unnecessary to only mail 65+.

That way you can see for yourself if this is a good or bad deal for you.In the end, if this is the best you have and the deal still makes financial sense then don't let the higher cost of money prevent you from doing deals.If you need more help just PM me....Peter

Or since it didn't specifically state continuation, that is unnecessary? 

Run a clean ship and you will avoid unnecessary hassles.

My concern is, how do I prevent the seller from taking a HELOC or something without my permission?

Expenses are necessary and ordinary costs of doing business which include repairs and preventive maintenance.  

That way you won't run into issues preventing you from getting to the closing table.