An owner of the home is looking for someone that can provide some show money. 

IMO cash flow provides a way to mitigate the risk of unexpected expenses and loss of income due to vacancies.

I specialize In helping investors like yourself locate, and secure investment properties and provide a hands off experience along the way.

At a 7% annual return, this could grow to $908K after 10 years, providing immediate liquidity and diversification.Alternatively, holding the property could yield $825K net equity after taxes in 10 years, assuming a $900K sale, with the potential to defer taxes via a 1031 exchange if reinvested into another property.

I would particularly love to help someone within the Atlanta area with a fixer-upper by providing some physical labor.

You would have to go after the one individual for non-payment and you could only remove the other three by going through the legal process like you would for someone on a verbal agreement, which puts you in a he-said, she-said situation. 

This is prime real estate, and is just about the last piece of land in this area.I have begun to develop a commercial property that I own with contractor garages, which is the extent of my experience in this space.I'm trying to get a sense of how to structure something like this, with using LP's, and also partnering with a builder, and carving something out in that regard.Does anyone have recommendations on who is currently working in this space and could provide some insight?

The only other options I can see are A) your mom partnering with you rather then selling the property to you - you become 50% owner and bring the funds and management to the rental while she provides the existing equity as her contribution; or B) your mom lending you the rehab cash out of her personal funds while also seller financing the house to you. 

Is her goal to be nice and provide some of the gains or reduce her taxes by trying to split income between her and her ex?

If a cash out refinance, many lenders will allow the cash out to satisfy the reserves requirement.DSCR lenders generally let you vest either individually or as an LLC.