Now as a home owner in a B+ neighborhood with a large family, the difference of $50 is a drop in the bucket with a family of 7 but back then I wouldn't have even considered the unit I rented if it were $50/mo more.

Cap rates for class-A/B MF suburban homes in this area is closer to 6% (similar to my analysis spreadsheet).

I do 20% down and still cash flow in AB.

Straight from AB 1069 65852.2.

So I would go from having three notes (A, B, C), to having only one note (B).

My question to Bigger Pockets Members is, do I take option A, B, or C that my lender has but out in front of me?  

I live here in Chicago (South Loop) and in doing my due diligence learning about real estate investing I've read the opinions regarding the pros and cons of the various neighborhood classes (A, B, C, D).  

The lender will usually have loan docs for the wholesaler to sign at closing, which is merely a CYA for the lender.Since there will be 2 closings same day; seller to the wholesaler (AB), and the wholesaler to their end buyer/Investor (BC), the lender will wire their funds once all the closing documents from both closings have been signed and the end buyers wire is in the closing company’s escrow account.

You said that it's in a "pretty good" neighborhood...is it an A, B, C, D, or F neighborhood? 

Negative, it's what I would consider a B class neighborhood.