Some additional info about me that may be helpful:1) I have significant self control and am not concerned about spending the money away that I would get from any of these options.

In no certain order this is what we find matters most on a BRRRR appraisal as far as things you can control- outside curb appeal- remodeled kitchens, baths- Updated electrical and HVAC- a new roof if the current one is a big eye sore

I used my uncle to set up a Joint Venture and then sold my shares to him.

@Carter WallaceWell, a joint tenancy or tenancy in common is generally much more "restrictive" on what/how you control the passing of the interests.. 

LTR is like a car on cruise control.

I live in Los Angeles and, as most homeowners working in rent-controlled areas can relate to, having renters in a unit paying excessively low rent can be a pain.

They are not free but give you an extra layer of quality control and accountability.  

I agree  on the above but as an investor in this raising rate environment, asset-based (aka DSCR loans) are the way to go irregardless of Partnership or Solo venture purchases.

You can try to calculate and control every variable factor and expense, but that is also how a lot of newer investors get caught in the analysis paralysis phase.

Natural disasters, rent control, ordinances, against STR's, taxes etc all pose risk to investors in real estate.