Why is everybody ragging on the OP? He already admitted that that he didn't know enough and has made mistakes....
Anyway, I would agree with advice to keep the multi and ditch the townhouse, even if you have to pay a little to get out from under it. It's hard to get a good multiproperty and it sounds like you have a good deal which you (by luck or by skill, who cares!!) bought right. Now you just need to decide if you really want to stay in real estate. If not, sell and take your $$ happily elsewhere. If you do want to stay in the game, LEARN.
An empty unit is such a drag on your bottom line, need to correct that immediately. Nothing should be more important to you than rehabbing and getting that unit back on ASAP.
Unless Michigan is very different from Florida, if you have a tenant in place that hasn't paid in 3 months and you are, JUST NOW, getting to your court date, then you need to evict your property manager as well as your tenant. Go to your local REIA, look for recommendations, and, again, LEARN.
IF you want to get out of real estate, no shame in selling, but if you want to stay in, you are not very likely, in today's hot multifam market, to get as good of a deal as the one you got in 2014. So the idea of selling this one to reinvest in another doesn't sound good to me unless there is really something fundamentally wrong with the property, not just with how it has been managed so far.