You need to determine the value of your current home, then sell it. It is obviously not worth what you are asking, or else someone would have looked and offered.
"It rents easily and at a decent price but not quite enough to cover total ownership on the current loan" -- What does this mean exactly? Does the rent not cover all expenses, or does it not cover PITI, or not even PI?
You might want to look around & do some more reading. You don't seem to know the relevant terminology for your rental, and the question you are asking is actually really basic. It worries me that any answer you get here won't make sense or be actionable without a large enough base of knowledge to understand it through. I suggest you spend more time reading this forum and other sites, such as biggerpockets.com, until you get a better understanding of the basics. If you still have a question at that point, people will be more able to help you.