My 2nd and 3rd floor tenants has no problem and they have additional portable heater running to keep themselves warm. 

We should have known when we found a rat trap in the closet on move in day.  

Some tenants are tempted to use the basement bonus room as a bedroom (dry, painted concrete walls and floor); yet it does not have proper egress windows or a closet, so we let them know it is not to be used as a bedroom.

Examples - he built an unpermitted outdoor canopy for his tools that's connected to the main structure, reversed the laundry hookups to run outside rather than inside, converted an interior patio into a closet, and even worse put together a 'shanty' on the side of the house for someone who sleeps in the backyard (this was hidden under tarps and I discovered this - not my inspector).I contend that I have plenty of support for an eviction, but I discussed this with someone from a local apartment owners association, and she said that I wouldn't have a right to evict.

Patti if there are portable sheds and items that are YOUR PROPERTY not inside the mobile home you can take those as they are not the property of your tenant.You would have to make sure the tenant did not store anything of his inside those buildings.The reason you are getting trouble with the police is you are doing a "self-help" eviction which is against the law.When the landlords make a mistake they simply can't knock on the door and tell the tenant "I screwed up letting you rent here now get out now".Even if the tenant left a pro-bono attorney would have a field day with you for doing such things.If the tenant is doing drugs maybe you could file a report on them with the police and get them arrested.This is of course not legal advice of any kind.Trailers are a real tough business.You usually get transients and other unstable tenants that won't qualify for a regular apartment or renting a hotel by the week.You get a couple if nice folks but many are bad and trash the units.My mom's friends have been in the business of renting mobiles homes for 40 years and have about 50 or so.Just had one trashed like you are describing the other day.They buy the trailers real cheap because they know they will take a beating.Maybe the land the trailer sits on is worth a bunch of money.You could get this tenant out and sell the land and take the cash and invest in something with less of a headache.

I think I, too, will ban firepits and pools.My lease says I forbid then without my written permission, so I'll keep that enforced.A portable fire fit seems like "no big deal" to a tenant, but I see a strong gust of wind and the property burning down.

*Consider purchasing a low-cost individual E&O insurance policy of your own, which is portable and covers you for any transaction you might do.

Closet doors?

I could possibly free up space for the second shower by putting in a tankless water heater and repurposing the closet where the 'vintage' unit currently sits.

If we upgrade the electrical (main panel upgrade and 4 fuses in the closet in each unit), we will have to spend A LOT...