If garage is heated, then you and your tenant need to decide who is responsible for utilities.I hope this help

That would mean no heating/cooling system, broken or dilapidated plumbing, non-watertight roof, failing foundation, etc.

And it's getting harder and harder to find deals in most areas the more the market heats up.

Unfortunately, little did they realize that setting the temperature of both thermostats in this manner ended up placing the burden of cooling on one package rooftop unit which was never intended by design to cool much less heat a building of this size by itself.

I prefer natural gas over any other type of heat.  

If the water heater heats, doesn’t leak, and vents, then it’s fine.

May be possible with newer "no cut" water metering.Upgrade electric throughout the building adding mini-split A/C-heating to each unit.

You can also look at the crime heat map on Trulia.

@Brandon Rodriguez an economical lighting solution would be LED lights, since they are extremely long-lasting, energy-efficient, and give off little to no heat.

The house really needs carpet pulled out and A/C unit is straight cool and is expensive to heat vs having a heat pump.