All around the house is radiator heating with a gas powered boiler in the basement on an elevated concrete slab.

I would chat with @Ethan G. as he's the only attorney I trust. 

If you are looking to flip, give them the listing, or if you are going to dozens of properties, pick them up a gas card from time to time.

Single family rental: customarily tenant pays all utilities, owner may pay waterMultifamily 2+ units: customarily owner pays water and trash (included in taxes for 2-4 units in city of Cincy), owner may also pay gas/heat if it's a central system like boiler/radiant.

Make them take over electric, gas, internet.

Rent rate includes the following utilities, up to $150 per month: water, electric, sewer, trash, and natural gas.

You also need to check with the utility companies and get cost estimates from them for availability, fees, hookup charges, transformer and power line/power pole locations or relocation requirements, water, sewer,gas, cable etc You will need ball park cost estimates from site work contractors for site work, roads, installation of utility lines etc. 

Will the units have separate meters for water, power or gas? 

That's it, so income less those expenses is $80,300/yr.I wasn't given the details of the seemingly high utility costs as all tenants pay their own gas, electric and trash disposal.

Do you need a chimney for venting gas furnace?