What next is your son going to invite random street hookers to live with him or maybe the local crack dealer ?

Think for instance you go to your local drug dealer and sign a contract for 3 kilos of Cocaine at $50k a kilo and when it comes time to pick up your product he is selling for $55k.

Are there any installers/dealers in the southern Maine or New England area?  

The dealer sells the property to the end buyer you've lined up.

My attorney, my forex dealer, my accountant, my title company are all wonderful sources of leads for buyers and sellers.

Trying to find folks to sell them to - surplus dealers or the like.

Much like the shift from growth stocks to dividend stocks  to cash depending on the state of the market.My understanding is that the DST structure as an SEC broker/dealer product does not allow compensation of any kind from brokers to third parties regardless of location. 

I have to an oppertunity to get a new Modular home ( NOT Manufactured home) at dealers cost!

Houses are like cars... it's possible to get a good deal from a listed (MLS/Dealer) it just takes more work.

I can look it over and/or there are others knowledable about the market and property managers like @Matthew Irish-Jones that will help you out.