This caused a lot of proceeds issues with refinances, not issues with borrowers/properties qualifying.

What is the best to accomplish this without causing the lender to accelerate the note. 

The end of a lease is not considered good cause so landlords can't just choose not to renew.  

The fact that the park is abandoned is also a cause for concern.

The issue is they may try to trash the place if you have them vacate - depending on how much of a renovation you were planning to do that may cause more issues for you.  

On the other hand, if it's only happening in one spot under a missing piece of gutter (for example), then it was probably just an ice lens that caused it.

There was a ton of mold issues as well and since the house was well known to the town inspectors they extremely vigilant on the work we were doing causing some delays.

There are exemptions to the relocation assistance for week to week tenancy in Portland, but still many rules around no-cause terminations on the state and local level.

The possibility of bad tenants causing damage, or not paying rent, which could lead to negative cash flow, etc.  

With the COVID scare, stock market crashing a bit (for any savvy long term investor, who cares, but regular folk get scared any time they see red), election causing uncertainly, it is inevitable that people will look to sell their extra property, and also likely scare away half the buyers.