How is water heater, furnace, AC? 

But tenant has to pay all utilities - water/sewer, gas for heat, electric.

Maybe you misunderstand how the mail system works.

They depreciate so quickly that most of the time you're "under water" on the loan.

You need a good source for local landlord tenant laws, a  reserve account for the unexpected, setup a payment tracking system, find a handyman, set expectations with your tenant about what constitutes a valid emergency, have the tenants sign a "walk through" list with photos of the condition of the house, make sure they have renter's insurance, 

Every market, submarket, property type and platform could potentially have it's own systems that work best for it.

In my experience i’ve seen higher returns with some of the small properties because they are owned by mom and pop and have a lot of room for new systems and processes. 

If you're looking to reduce the utilities only low flow faucets and shower headsdual flush toiletslower the temp on the water heater.Make sure the HVAC filter is changed monthlyPreset thermostat.

The exterior is terrible and needs to be redone, the inside looks bad too with the ceiling and walls falling apart, and I'm guessing the hvac and other systems will need to be replaced.My question is, can somebody give me a ballpark estimate of how much it would cost to rehab this house?

Owners pays for water, sewer, etc.