Also the hit rate per property is really low.

The interest rate is not special nor is the 20% down (80% LTV).  

Assuming I also use the Airstream for lodging while traveling for personal reasons, would I just take a pro-rated amount of depreciation for the amount of use that is business vs. personal?

My properties average 4.9 star cleaning rating, which is hard to accomplish given how petty some guests can be.

With insurance companies canceling policies and raising rates has anyone uncovered a way to self insure rental properties?  

Is it high appreciation area with a low rate mortgage?

Oh and the economy, interest rates and buying sentiment matter too!!

The drop and Swap is about all we use here due to the confiscatory tax rates based on sale price.

In this case, you can use Rental Income from the units that you will not be living in and that income can count to help you qualify.FHA rates are going to be lower than conventional for you almost always, but FHA does have a 1.75% funding fee. 

If you're using financing, evaluate how a rate hike could affect your payments.