Buy more cash flow properties or pay off student loans

[Drew Oberholtzer]

i have several rental properties that have appreciated significantly over the years in Philadelphia. I purchased these prior to graduate school and my wife's architecture degree. I can't decide what the best strategy is to continue investing. Student loan debt is no joke especially when they're considered in ones debt to income ratio making it difficult to refinance, obtain a HELOC, and obtain a mortgage. It's also significant overhead that carries interest. I could eliminate all student loan debt by selling all my houses with a little left over to buy an investment property in a class B or C city. Any advice or feedback would be greatly appreciated.