As an "Arbitrager" myself, I see a variety of problems that could come up for the building owners and staff, but hey, they didn't ask me before launching! 

BiggerPockets has a variety of great books for different types of involvement in real estate.

I've taken some basic classes in a variety of things just aimed at homeowners doing some repairs and home projects (electrical, plumbing, drywall, woodworking classes), and I've long been interested in potentially finding some work / gig work as a construction helper or the like.

(I am not an attorney, but I do expert witness work FOR attorneys on a variety of mold-related issues.)Often times, I tell folks to take photos of how bad it was in the beginning, how it looked when it was all cleaned up, and then how the finished product (rebuilt area) looks today.  

@Joe Kooner When I say “refine goals”, I mean things like variety of industries in a market, employment drivers, city size, etc.

It’s good to educate yourself on the variety of mortgages available.... 

I have heard people recommend using a percentage of rent but that method doesn't seem practical to me for a variety of reasons.

For the BRRRR strategy, you have a variety of options.

I am not surprised that you have not found a variety of these plans.

I’m looking into investing in a duplex in Marietta, Ga within the next couple of months for a variety of reasons and would like to speak with someone who has done residential multifamilies in that area.