Fairborn, which is maybe a B or a C class neighborhood, is home to Wright Patterson Air Force Base so lots of potential for military families and single Airmen/Guardians moving off base.

One of the homes is move in ready, with very little potential for value add due to the awkward layout and limiting lot size

It is smart of you to look into getting the heloc before moving out.

But my mailing address has changed since I move around a lot. 

I will be moving to another state this summer, and plan to rent out my house as a MTR.

I'm moving on to the next opportunity....

You don't have enough equity to sell, so stick it out and make a strong effort to buy down the loan enough to sell and move on.

I know the whole mentoring space is full of charlatans and "those who can't, teach," but I've done my due diligence and this outfit has legitimate results, so I'm comfortable moving ahead.What I'm struggling with is if I actually want to own or be responsible for a large apartment complex.

Still lots of people and companies moving here. 

Most lenders have seasoning requirements, so you would need to own the property for 12 months to obtain a loan based on appraisal rather than lower of appraisal or purchase price.The longer the period of since property purchase the more likely an appraisal higher than purchase price.The exception may be a "hot" market where prices are moving up sharply almost every day.