Buying subject to is a similar arrangement you would probably have the schedule to make it easier on seller.

Is there a forum or subject on this matter here that would help me better understand the process?

I would contact an experince (in this subject town) and ask them if there is anything to look out for. 

When I find a buyer, the buyer is actually signing a contract with the wholesaler, and this second contract outlines my commission to be paid by the wholesaler.

Residential relies on comps, which are also subjective.

Take over the mortgage using Subject To2.

Yes a second can foreclose and take over subject to the first.

Only if you pay full fair market value (which is subjective, only to be known upon an open market sale). 2.

Primarily for now I'm looking for someone who can help with structuring wholesale agreements, contractor agreements, subject-to's & owner finance deals.Looking to build my team and add as many pros to the list as possible so I'm not scrambling once things take off. 

If you do not have this outlined in the lease, they could theoretically stay as long as they like.