Yeah, @Mike H., you raise good points. This is my first real world entry into landlording, so as the rubber meets the road I'll learn some of this stuff I've only read about so far. I follow the neighborhood facebook group (~10k members, really active) closely, and I see demand for studio and 1bdrm apts, so a daylight/walkout basement should rent pretty well, I'm thinking. I'll leave it vacant for a few months if that's what it takes to get it fixed up really nicely, because there's a big difference between nice basement apt and sketchy basement apt.
As far as the rehab goes, I'm not a flipper, but I suspect that with ~2k in paint, drywall, flooring, and a new bathroom vanity I could flip this for 20k profit. But I don't have a well-defined rehab scope at this point, nor an ARV. The area is crazy, but I'm really hoping for a long term buy and hold. If I need to get out of it I'm pretty positive I can just from updating some finishes and cleaning the junk out of the front yard.