If you want to build up your credit and some cash, have you explored wholesaling?

agree with @Michael Jones on that, sounds like lint build up.

.), but between you and I, I note that you're closer to retirement than some of our other posters, so there's nothing wrong with being conservative and safe with your nest-egg that you are still continuing to slowly and safely build up. 

My two cents would be as painful as it is, payoff that debt ASAP build up some reserves and go after some rental, flip, wholesale properties.  

You have build up on your horizontal run as well as where it drops into the main. 

It is good for the newbie investor, to get their name out there and start networking until you build up enough capital to secure a loan to do something else in REI.

Had also considered just leaving it alone and letting it build up towards another rental property.

Over the course of the next 20 to 30 years we will build up our portfolio until we reach the point of exchanging into more passive triple net lease class A properties requiring less intensive management. 

Definitely a longer term investment that will take a while for the cash flow to build up.  

If you diligently research and choose your area, get yourself on the ground and build up a network There, and have your figures down pat, you can succeed.