Think of all those apartments that you rented or visited that only had one (1) door to enter.Agree with others, that you should make sure the work was permitted and approved.Mike:While windows with openings of a certain size do provide and avenue of egress, two separate doorway exists may still be required - particularly if one opens into a common interior space.  

@Mido AliIn terms of general business Principles by Ray Dalio was extremely insightful.The book on rental property investing by @Brandon Turner is one of my favorites for Real Estate.

You can do a simple web search to find brokerage firms that will hang your license for a flat fee verse a % of every sale/purchase but you won't get much assistance from them and I am not sure exactly how "legal" all that is.Other things to consider, 1) there is a fee to have access to and be able to list on the MLS, 2) I think the state requires you to carry or it would be a very good idea to carry Errors and Omissions insurance commonly called E&O insurance 3) if you plan to tour properties, you will need to get those electronic keys that agents have and I am guessing there is an annual fee associated with that.Those are the big ones I can think of off the top of my head.

What about common area Electric?  

I have an extremely rare opportunity to jump start my real estate investing goals.

Usual upgrades are LVP flooring in all common areas and bathrooms, neutral tone paint, paint the cabinets, new lighting and fixtures, and stainless steel appliances, which I really believe makes all the difference in the world with C-class apartments.  

That sounds extreme.

So I see all these videos about tiny homes and it got me thinking after I saw one that was a converted bus.

Is there a way you could buy a duplex rent both sides out then live in somthing like that or a rv or somthin...

This sales structure is pretty common in CA where property values have appreciated as you've described.

I dont believe this is common outside of MD/DC however.