I now have three rehabs going on simultaneously and he covers all of them.I still manage the layout, design, and procuring of finish materials.

If you try and bring another agent in now to represent you there may be a procuring cause issue. 

I have a situation where I have found a MF deal and found a buyer who is interested in buying it. I would like to hold the financials and rent rolls close to my vest until I get the buyer to sign an NDA agreeing that ...

If the rehab goes over what the lender provides, I'm on my own with procuring the difference? 

Your long term success as an investor is likely related to how well you're able to procure mortgages and financing.

None of that looks excessive to me and in Atlanta you would pay a full months rent to procure a tenant (leasing fee). 

To protect your interest, you can hire a construction management company/individual that will look over your side of the fence, this will cover your GCs change order, procurement process, punchlist closeouts, payment approvals, it's all in the plans, you will also have to hire a good A&E company that CAN save you money, some are geared for looks without thinking of costs, and some just make you a box where noone will want to visit your establishment.

(architects call this phase procurement or bidding and negotiation)What is the biggest value that your firm brings to my project?

Since then I have read many books, articles, videos etc. and am very, very keen to procure more information about the subject.

Trust me, you don't want "experience" without first procuring the proper knowledge, seeing as that experience will likely be a bad one.