Navy I have decided that REAL ESTATE WILL BE THE VEHICLE that will free me from my marriage to the time clock. 

Who really knows, but keep in mind that your "personal exposures", such as your vehicles, home, etc...

You were able to take control of a house for (hopefully) little to nothing, or perhaps even convince the seller to pay up the arrearages and a little to you, and now you have a business vehicle (the house) that can spin off $250/month of positive cash flow.

She slumped.I lost the sale because I didn’t keep a file of contracts in my vehicle.

(ADU "code" says that it has to be on the back of the property, but is this pre-fab thing more like a vehicle than a building?

That's the precise reason why we do this.

Your DTI will take a little hit with the purchase of a financed vehicle. 

Real Estate investing has given me the freedom of being in control of my own destiny, no longer needing to work for someone else, and giving me a vehicle to help those that work with me to achieve their goals and dreams.

I'm a part timer as my full time job is in Cyber Security, but I see real estate investing as my vehicle to achieve financial freedom.  

Small parks trade at a discount (higher cap rate) to larger properties precisely because so few people want to 'mess' with a small park and that financing is difficult to come by.