I was trying to gage the gross income and the occupancy rate was one of the slots in my AirBnB calculator.

that some investors have used electronic door deadbolts with the buttons for the passcode as well as the key slot, to eliminate tenants from calling you to let them in if they forgot their keys etc.

See this thread Pg 3 where I stop a Hong Kong lady from buying a TK house for $45,000 that the TK provider had bought for $500 and hadn’t even evicted the deadbeat tenants yet.

I would like to continue obtaining FNMA financing, so the question is this:Can I transfer any of the these properties into an LLC (that I would need to create), in order to free-up more slots for additional FNMA financing?

It's a slower process building your business credit reports for non PG credit.

Now a spouse has a few freed slots.

The minimum you should have in this slot is $150.  

There's a reason slot of the houses are that cheap, there's not much growth there.

But if you look hard enough you get a surprise like PG county police have maps with lots of filters and tools (maps at bottom of page @ pgc.gov/crimemaps )I think quite a few area police departments have twitter and facebook feeds.

PG County and DC are the 2 locations in the metro area where the most flipping occurs.