The reserve and new opportunity fund are bloated, fat, stupidly overfunded & earning little.

I then refinanced it with a permanent lender.

Install non-rated aluminum framed windows with either tempered or laminated glass and cover them with permanent hurricane shutters.

Is SEP IRA contributions added back in the way that depreciation is or will it permanently reduce my income on paper, even though the money is mine?

That's probably what you'll need to retire the current mortgage and get you to better occupancy and a permanent loan. 

Combination of tree roots and old cooking fat kept closing up the pipe. 

Once you get to a "permanent" location (I put in quotes as no military assignment is permanent) you'll have more time to devote to real estate investing, and more financial acumen to make it happen.

Your thanks for letting someone in this position live free for two days or two weeks will be a big fat lawsuit from the next tenant that wants the exact same treatment and you say no.  

Whether you can legally keep it permanently locked is easily answered by your local codes.

I have heard that getting funding for MH's is difficult due to them usually being treated as a depreciating vehicle and not as a permanent structure.