Then consider if there are actual real upgrades that would require them to vacate.

The good thing about househacking a legal multifamily unit is that lender allows you to use the vacated units of 75% market rent as an income to offset the potential current mortgage.

Another example would be a tenant goes on vacation in the winter and heater breaks and freezes the pipes, because the tenant was on vacation or not home its not their fault.

Mixed usages, such as a furnished mid term rental of one unit or vacation rental usage (where permitted) is also an excellent way to boost revenue.

They can also manage the listing on various vacation rental platforms.Control Over Occupancy: The management firm will operate within the guidelines you set regarding the rental periods and occupancy.

I wanted to make a post about self-directed IRAs and holding vacation rentals like an Airbnb in them.

If you're in a vacation area, there may be a company that provides some of these services on an as-needed basis, such as checking on a house after a storm, or scheduling repairs and being there for the repair person. 

Are you talking about permanent movers, or those on vacations of some sort, or people who are temporarily to be housed due to an emergency and then intend to move back to their old stomping grounds?

Any recommendations for lenders who can offer 90% LTV for buying secondary/vacation home?

My tenant has not been paying rent for four months now and refuses to vacate.