Tell the original seller so he can be there with a copy of the deed to prevent the placement of the mobile home?

A title report would be necessary to confirm whether or not there is anything preventing a current sale by the owner of record.

This is to prevent someone from piercing the veil to ultimately bypass the LLC and sue you personally.

Lots of opportunities to stop and prevent it. 

Oh, let me count the reasons, stark and clear,Why in the Rockies, dreams might disappear.Firstly, time's dance, a tango unforeseen,Delays and setbacks, patience in between.Secondly, budgets shift in mountain air,A treacherous venture, costs rise with care.Like winds that howl, a financial plight,Draining pockets in the mountain's height.Thirdly, expertise, a crucial call,A craft refined to prevent the fall.In rocky realms, build cautiously,For seasoned skill shall guide to victory.Oh, let me count the ways, with wisdom's might,To pause the dream, build in clearer light.Where were you CountTheWaysGPT when I needed you?

Reach out to agencies in your area (housing commission, Saint Vincent DePaul, etc.) explain the situation and ask them who provides eviction prevention assistance to renters.

Reason being for it is that insurance companies are getting tighter and tighter, and having a claim on your home can prevent you from getting further policies in the future and subject to much higher rates. 

Wow, that's some gall for sure.

It is your responsibility to change the air filter to prevent this from occurring (see Lease, page 3, paragraph 2). 

Owner preventative maintenance.