@Elvin William I am in classes, B, C, D and I would rather not be in D, it came with a lot of headaches but I finally stabilized it .

Hard money loan to acquire and rehab, then refinance into a DSCR loan! 

I am looking for some tips on building capital for an FHA loan, as well as some tips on networking with other investors and to possibly find a mentor.

We learned early on that:-3 of the 6 buildings are in a flood zone-the current owner has a loan, this lender doesn't require flood insurance-1 building took on a little water at one point during the 12 years the seller has owned the complex. 

My question is, can I use one of the separate parcels as collateral for a construction loan to build a multifamily on it (of course adhering to zoning regulations)?

If you are putting in 50% of the purchase money, guaranteeing the rehab loan alone, and doing all the work, it does not seem fair to you that your investor takes 50% of the profit.Though there are lenders that specialize in second-position rehab loans, most who make these will expect to be in first position.

Loans from the FHA, online investment groups, middlemen, rent-to-buy deals, ready-to-rent homes, and borrowing from private lenders can cost less at the start, grow in value, and give you a steady flow of money.

They may be able to help with a business loan 

Should I sell it, do a cash out refi, bridge loan, etc...?

Mine are 5% of loan balance if prepaid within 1 year, 3% within 2 years, 1% within 3 years.