Clear up the myths, clean up the mythos, and truly get to nuts and bolts of investing.

Hopefully they leave the place in good shape and clean so you can put it back on the market

I'd also have money held back at closing (a significant sum of money) that they do not get unless they are out within the 30 days (or whatever you agree to-do whatever you need to have them treated as a short term tenant) and leave the place clean and in good condition (ie same or better than when you viewed it).

If they choose to leave, then I would give them no more than 60 days to vacate, clean the place up, and rent it for market rate.

Quote from @Branden Rivero: The issue I see is the building is close to 100 years old and with a $500 hoa it's not an easy sale for an investor Yes, thats true however all expenses the past year increase insurance, sewer, trash, electric and cleaning service.

Brown RentRedi tries to enhance the DIY management options.It is NOT a replacement for a PMC.Recommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

The attic has to be cleaned as well.

If it's your building, and you want to clean it up, clean all of it up.

Those guys aren't cleaning that crap up. 

I started with house hacking and then purchased rentals that were clean BRRRRs.