"subject to" on a BRRRR property with construction loan

[Ryan Deasy]

Hey everyone, i am wondering if any one has done this or has any thoughts on this situation. 

I have an opportunity to take over a rehab loan, subject to, that is about half way done. Seller wants out for financial reasons. There are some funds that still can be drawn to finish up the rehab. From my end, it is a decent deal. Anything i should look out for or do?

Also, trying to wrap my head around how i would trust seller to pay the mortgage if i send him the money every month. I know i could make the payment too though. Trying to avoid issues with lender. 

Thanks!