You'll want to ensure that the lease clearly outlines the terms and responsibilities, including occupancy limits and any necessary modifications to the property.

This would be an investor insurance policy should the sales and/or product success be substandard. 

Buying carefully will increase chances of success. 

i am looking to invest in a long term multiple family near downtown.. the prices are much better than north jersey ( where i live) , but I'm not sure about the rental markets and typical cap rate. let me know if you're open to discussing further

Personally and professionally, I'm craving connection more than ever (it has been a long, weird 10 months and I miss our local meet ups).

Long story short he cheated on his GF who basically paid everything now he will not pay or move.

Is the only way to evict him to wait for non-payment of rent if he goes to jail long term? 

Former would be permanent while the latter could be temporary (as long as the barn or fences exist, for example) if desired.The surveyor you just hired can help with the language required for either. 

Can you give us details, price, downpayment, loan terms, cap rate etc.

Owning a house together is like a long-term business partnership, so make sure you have a clear exit strategy in writing.