Run a background check on the added tenant to see if there are any criminal history, eviction record.

And I'd expect my credit score to reflect that in a year or so and move back into purchasing a home rather than rent.The firm I work for requires credit/criminal/security clearances.

Internal parts of the HVAC are in the ceiling. 

At the limits of what this society tolerates in membership fee avoidance are agents of the IRS.But what's far more interesting for me is what keeps the bulk of the population in line. not the tiny minority of criminals or major tax cheats.

They're thinking of adding criminal penalties if people are killed when they couldn't get out in cases of some renovations. 

I remind my tenants that when they complain about roommate disagreements that they are all responsible for the entire contract amount and that they are the ones that are responsible for figuring out how to handle internal problems.It's been my experience that renting to roommates or students can go very well as long as the landlord is willing to clearly articulate what the duties of the tenant and of the landlord are.

My guess is they could be international investors that need to park their money somewhere stable or people betting on further appreciation?

Ask them a couple of qualifying questions like "will you be able to pass a background check that includes criminal, credit and rental history?"

I actually work on a lot of deals down here in Orlando that require it to be a mail away due to the clients being out of state or international. 

It was an international wire and the funds never showed up in the escrow account.