Always good to trade insights with someone who knows how to work a negotiation.

You are correct about that, but that's usually a computation and decision that an investor makes after a couple single-family homes or small multis.

Also, I found 2 ideologies regarding such development projects: Use one GC for the entire development or use that GC only for crucial trades such as foundation, framing, roofing , external siding, etc. and use sub contractors for finish and interior work to reduce cost.

They are simply trading one thing for another.

If you're willing to travel and hour and a half and be hands on then you'll most likely accrue more equity in your deal when you have a successful renovation but you're trading your time.

Have recently started a renovation company with a friend, both of us successful business owners and talented in the trades.

You're going to have other trade offs like higher interest rates, shorter loan terms (like 3 or 5 years) and maybe more lending fees. 

I'm looking for advice of finding a good GC  (BP approved) or contracting out each trade separately myself.

Fannie Mac is a publically traded company, ticker FNMA (more later).These GSE’s were created to to promote homeownership by providing liquidity to the secondary mortgage market.These are GIANT housing players, and this is hard to understate.

With an average monthly profit of about $1,175 after expenses, it’s proving to be a strong investment.If your parents sell their home and want to move in, you’d need to weigh the trade-offs—losing that steady revenue vs. the stability of a long-term tenant.