They also 'flip' cars from auctions and often have non registered vehicles in the spaces, they switch plates from one car to the next.

I think autonomous vehicles will be the future for most, not everyone has a car.  

STR is the vehicle or were you thinking something else?  

When the shutdowns and eviction moratoriums happened, I shied from real estate investing for the time being until some stability hit the market and after returning from a deployment recently I find myself back where I left off.With a VA loan at my disposal and cash from savings and the downsizing of my vehicle in our WFH era,  I'm hoping to owner occupy a small multifamily in the Dallas area, from there I'll stabilize that property and move onto the next investment as a pure investment. 

. - There's a few options there right now & Garfield in Bergen County has some options as well but you'll most likely need a vehicle for all these places as their more suburban.Let me know if you need anything else.

Additionally, the area is easily accessible with public transportation and/or vehicle since there is a major interstate highway. 

People may decide to trespass on your property on foot, vehicle, etc.

Keep your property tax baseComplications- picking the wrong team will cost you> its construction and it can go off the rails with the wrong teamUtilities--ADU needs own hot water heater, other than that you can tap into the main house, usually.

MHPs are the best accelerated tax vehicle I know of.  

Are there any other mortgage vehicles that I would not have to put 20 percent down or that would use rent to qualify me for more money .