The good news is that you can still acquire this 4plex relatively cheaply with only 5% down using a conventional Fannie product.

But speak to your tax professional and your attorney on what is the best course of action FOR YOU.

You can fantasize as much as you want but if the lending or numbers don't support your goals, it's your Realtors's job to work with you to find the best course of action!

Spend your energy on action, not reaction to a negative. 

I will follow up with PMC to see what action steps we need to take to get these rented.

Bring an action or defend your business in court.

Want to sell my apartment building by owner best course of action

If their lease runs for another 6-12 months though, then you have to decide if you're willing to take on the hassle of 6-12 months of chasing down rent payments, delivering late notices, threatening eviction actions, and potentially going through the eviction process itself.  

That is great news.

Most likely the state where the property is located is where lawsuits would be brought if they are something for personal injury like a trip and fall or something of that nature because the “cause of action” arose in that state.