Transactional Funding/Double closings Massachusetts

[Robert Blocker]

I am beginning my journey in wholesaling, I recently had a situation with a home owner who wanted a Proof of fund letter to possibly put put the house under contract, however I lost that deal because i didn't come with POF letter in a timely fashion, upon learning about Proof of funds i learned about TRANSACTIONAL FUNDING for wholesaling houses as well, so before my next wave of calls come in due to direct mail I would like to learn the transactional funding process and how to double close a deal in massachusetts. Can i double close or must the a to b be sold from transactional funding in massachusetts. then B to C? can someone explain and should i use transactional funding locally? i don't want to get the house under contract then run into problems with the closing attorney because of funding issues. Thanks