You've got a great rate on your mortgage, but your equity is tied up in the house. You should have opened up a HELOC when rates were low if you were looking to tap into that equity, you've missed the boat on that one.
You've got a house that's costing you very little to own. Seems to me like your options are:
1. Live in it since it's cheap, invest your extra money.
2. Rent it, whether long term or short term rentals. Get a property management company if you don't want the hassle of being a landlord. You're still cutting checks for when things break though.
3. You don't want to be a landlord, so just cut bait and sell it and do what you want with the money.
My thoughts: You don't want to be a landlord, so don't. Sell the house and take the win.