I've been an entrepreneur for about 15 years now and since my first adventure as a entrepreneur was in a construction related trade, I consider myself very handy and somehow capable to deal with contractors.

It sounds like the ONLY benefit in this deal is the 0% carry-back and you are trading that for a reduced rental rate renting the property back to the family member.

I have been the Jack of all trades in the real estate industry.

It's a jack of all trades here with little to no trade offs/cons when comparing apples to apples to other large STR markets.The key to success here though comes in the knowledge and execution.

For example, a job with a builder will expose you to lots of things: land acquisition, new construction, renovation, trade experience and contracts, financing, permitting, etc.

I'm thinking 7 years + to trade equity, 12-15 years for material wealth generation. 

i have some trades i've worked with a few times and if i ask them for a rough estimate they'll provide it. 

I would highly recommend bringing in an advisor or broker with specific experience and knowledge in this asset class.I have seen many of these parks trade hands on a handshake and a dream, however, you could be taking a huge gamble if you don't get microscopic on the front end.

This has created, since about 2016, an asset class of very limited MF properties in the Southeast that trade at unreal cap rates.

I know meet GCs through trusted referrals or at trade shows.