Are you looking to invest in value-add for the long-term, looking to generate cash flow for the short-term, or are you looking for a vacation home that you can also STR to pay down the mortgage?

The tenant, who had unauthorizedly sublet the basement, along with all occupants, was ordered to vacate by February 29th, despite him being the sole leaseholder.

(Max vacated rents - your monthly mortgage payment) = +/- net cashflow.

Provide a vacate notice (per your state laws).

Maintain your business processes and give her the required "pay or vacate/quit" notices. 

I do not know every market in the US but typically speaking popular vacation areas which drive up rates also have high real estate values. 

Go to court if they fail to vacate after a month.

Tenant just informed me they plan to vacate the property tomorrow (so, 24 hours notice) due to "the business growing and the space now being too small for their needs."

I wanted to see what the frequency you could get the Fannie/Freddie second home/vacation loans with 10% down. 

People are going to stop going on vacation.