He was thinking of selling it for 90k, pay off two vehicles and take 60k to put down on a new house to live in.

I would put the neighborhood or nearest major cross street if that's more precise/useful.I would be careful sending out a flyer to buyers, that you don't advertise as if you own the property.

I never thought about making real estate the vehicle for my financial freedom until now.P.S. 

Additionally, they reinvest cash from the equity in their rentals into other rentals / vehicles in order to maximize their return and prevent "dead equity" from "diminishing" their ROI.  

Are these vehicles looked at the same way as your standard rental car, or do they have unique, accommodation-type requirements to fulfill?

I have used most of my cash to get it up for remodel and carried some on cc, and refinanced an inexpensive paid off vehicle to complete the job.

What are you looking for precisely, lawsuit protection?

Also, I want to make my vehicle finance payments through my company.

I have been investing in different kinds of real estate vehicles - mostly passive ones and have sort of stumbled upon an idea. 

It's an exciting investment vehicle and if done correctly, can benefit your for the long run!