NEVER AGAIN, but I have learned a lot & massaging them is akin to poking a sleeping dragon.

You have the right to refuse to rent to people who you refuse to make their intentions clear, or refuse to people who change their story.We've had several situations exactly like the one you described where a restaurant owner rented an apartment for employees and we've have a few where massage parlor owners were using our apartments for prostitution and we had serious problems every time.I would not go as far as taking the rental off the market, but you may feel better documenting every conversation, text message and picture.

Early on I started out with a 20 unit multiple property C-class seller financed deal and it almost bankrupt me as I didn't do my analysis correctly.It's great that the seller is willing to hold paper but be sure you aren't massaging the numbers to create a better deal than what's really there and be especially certain you have sufficient cash reserves to tackle a project of that size even if it's 100% financed.  

Both because of the fact they clearly have no interest in maintaining the exterior of the property, as required of the lease, and because they had no interest in resolving the issue of the additional people living in the house, we decided to gently suggest that they might be better suited to an apartment and that we were willing to discuss some form of negotiation to move them on somewhere else.

I have an STR and I'm wanting to gently reach out to newer markets. 

You may even be able to pry from the sides and gently pry them away in such a manner to save them and sell them to someone else in a yard sale or Craigslist.

I am sure he probably still needs to massage the numbers a bit but better than excel spreadsheets and a box of receipts.

Niagara Massager shower head.  

I know the list will be long, so please be gentle!

Best of luck and feel free to send me a massage if there's anyway I can help.