I used them for my mobile homes.

Such as storage, RV park, Mobile Home Park, etc. 

Locally, I know an investor that runs a crazy profitable trailer park where he is probably pulling in a 20%+ annual return on his investment - but he has to self-manage because no one will touch it, collects rent and deals with evictions armed, and has several "overseers" living for free on site to make sure no one burns the park down.

Reading this list I begin to realize why most burn out and thus not retiring from a successful career as an Agent. 

Quote from @Lee Burns: Oops, I totally forgot to add that. 

Is there a way to pass along the cost to tenants who have chronic problems with causing smoke by burning their food etc.?

Where are the competitors offering different UI experiences, third-party API integrations, mobile apps, and other innovations?

Purchase price: $4,000 Cash invested: $15,000 Bought land with 5 mobile homes on it cleaned it up now it's my construction yard.I would like to buy the land behind me and convert it!

Our SRPD has no section in it which specifically asks if the seller has knowledge there was past fire damage (unlike for mold) to the property, however, the buyer's inspection revealed burned wood that had been sprayed in the attic.

They say I've got a "credit", which I'll never use now because they burned me.