If I use seller financing to own a property, do I build equity even if I sell before the mortgage is paid off?

That's far from a definitive answer because its an owner occupant and a single family, but I would imagine if you e-mail the house/building department they should be able to give you a firm answer.  

I was already a licensed broker for a long time selling real estate, and as I began managing buildings, I had to get my managing broker's license. 

Look at ways to pay, build a team, start with something small, check everything carefully, move forward, and keep going even when it's hard.Begin with a small property or an easy project, aiming to learn by doing and slowly grow your holdings.

Usually you can lend for flips and builds. 

I'm trying to build my team while i study more into REI. 

I lived in an owner-occupied building with 2 total units. 

With careful planning and prudent management, you can achieve your investment goals and build significant wealth through real estate.Best of luck, and keep us updated on your journey!

I was thinking about driving for dollars to build a list of at least 3,000 properties.

I do live in my building so my income from the other 2 units in the building go toward my mortgage payment.