Pro-rate the rent and save yourself a lot of grief from an issue you would surely lose.If they had purchased renters insurance with loss of use/additional living expenses this could be a covered loss for them.  

It's much cooler and comfortable during the summer months than where I live in the northeast.

Often, even if a property does not advertise owner terms, there is usually seller receptiveness for the conversation.

There are DSCR lenders that will lend to an LLC where the LLC members live out of state. 

There is on step down to a living area - should I build in a ramp, or just provide a movable aluminum ramp?  

Also anything local is sure to be a hit, especially if its a conversation starter!

@Arkadiy IliyayevI live and invest in the area, although not in multi family.

The issue is that none of the expenses for the portion you live in are deductible on Schedule E.  

Good luck in whatever it is you do for a living

The issue you run into with Section 8 is that those people live like savage animals.