A good problem would be having 100 single family properties producing you cashflow.  

I just completed my first income producing property deal.  

Plus the volume you would have to produce.

Body/trim.  

What avenues have others taken that have produced results?

There is just no telling which approach will produce the greatest amount of desired results until you try it.

Even an MLS listing as a rental will produce similar results that you are receiving now.

Networking with escrow and title company, re agents, any body involved in re.There's a few.

There is a program for homeless veterans govt pays rent for a year you rent the bed and the common areas are shared can produce 2-4 times more rent.Locate and attend 3 different local REIA club meetings great place to meet people gather resources and info.

There are times when a pain ridden body can't lift the feet to get in the tub.So, you have to do your demographic research to get a gauge.Good luck with your renovation.