.- Smart Thermostats.- Bushhog and mulch overgrown pasture.- Paint inside and out.- New front porch and new deck/patio on top of garage.Hoping to sell it fast. 

If you don't, you need to keep a lid on things i.e. water saving toilets, landlord thermostats, keeping a close eye if tenants are having several other people live there, car washing services on premises, etc.In the end, it all depends on how it cash flows and your tolerance.

You may want to look into technology as well like new smart devices such as thermostat, lights and so on.

There are a lot of different factors on how the supply lines are run but home depot sells an electric pipe wrap with a thermostat on it. 

Also get the newer programmable thermostat it makes a difference 

I live on the 1st floor and have the thermostat in my living room and it is programmable.

This would include things like sensors and controls such as smart thermostats, lighting control, water meter flow sensors.

He changed out the thermostat without asking and caused a heating problem I had to fix ($200) and refused to pay for the repair that he caused, he got angry and I chose not to fight him on it.

He spends two minutes looking at the thermostat, doesn't even go up in the attic, and says "there's nothing I can do".

There are two thermostats, two air-conditioners, and two furnaces.