My two schools of thought: a) proceed immediately with eviction proceedings, or at least send a warning letter. b) continue trying to cordially reach them to mitigate fees associated with eviction, headache and them potentially trashing the place in retaliation.Any seasoned vets want to weight in here?

Our mortgage is in her name.

➡️Everyone in here already knows this:Entrepreneurs use their money to buy cash flowing assets or investments that produce passive income 📈How did you stumble upon real estate?

Condo HOA's could be an obstacle, although I cashflowed despite.

Given all of these obstacles, I do not understand why people suggest that out of state investing is an easy task at all. 90% of investors fail at investing in their own back yard, so investing a couple states away should not be looked as an easy undertaking. 

-Repairs and Maintenance is high but it looks like you could be including other stuff in here.

If the trailers are inherently permanent under case law and authoritative guidance, they're treated as real property and are depreciable over 27.5 yr GDS or 39 yr GDS. 

[(Bulb wattage) X (3) X (Hours on per day) X (number of total days in her lease) / (1000)] X (the kw cost of electricity) In your letter, explain it is the past and future considerations for the hallway lights being fed from behind her electrical meter during the lease period and will be the only consideration made.

My fiance has a house in her name that she would like to rent out in the near future.

LOL, I came in here to say "it's 1 degrees here in Seattle, stop complaining about 16".