The joists are then hung from this perimeter by inserting them perpendicular between the outside perimeter and the field laminated 4x12 ((2, 2x12s lag bolted together)intermediary cross beams that are pinned to #4 rebar that I cast into smaller, interior support piers.

This model also promotes a lack of skill and knowledge on behalf of the intermediary party.

There are time limits, qualifying properties, intermediaries, etc.

Lastly, we fund small scale loan firm, intermediaries, small scale financial institutions for we have unlimited capital.

The difference is the source of hard money and zero interest rate.If this is considered a prohibited transaction, what if they add an intermediary (e.g. a friend's LLC)?

Claudia Kieran is a Qualified Intermediary and can offer a lot of info regarding this. pm if your interested. 

I was at a 1031 exchange seminar and the Qualified Intermediary's attorney said that they advise their clients to have held the property as a rental for 24 months. 

There are ways to eliminate it entirely over time.Steer them to an experienced qualfied intermediary and tax planner.  

Like someone acts as an intermediary and buys it from him with cash and I use a mortgage to finance buying it from them?

Wholesaling is not flipping, it's positiining yourself as a contractual intermediary.