Call the local municipality where your rental property is located and ask if they have a list of certified local contractors or see the attached link for a list of NJ Certified Lead Evaluators...https://www.nj.gov/dca/divisions/codes/publications/pdf_lead...

They are simply a secondary marketplace, matching you with guests--and not taking any responsibility for cleaning or damages.

I don't blame you for cutting the GC out of the deal, but there are a few things to consider; you might need a statement from a GC at time of sale to certify that all improvements were done in a professional manner.

FB marketplace. 

The key is to make sure whoever is entering the marketplace is getting transparent information. 

zillow, realtor.com, facebook marketplace, put notice out to your friends and family you are looking for a roommate.   

I am not one to ever say negatives about "competition" in the marketplace.

My team and I have had a good amount of success in the Detroit Michigan marketplace and I am always happy to help or chat about Detroit ! 

There's a database of contractors who are Certified 203k Contractors. 

If the buyer certifies that they are going to use it as the primary resedence and it has a use and occupancy permit that alows use as a personal residence then I don't see why a lender would not.