You got some good comments already.The one thing I would add is if the gas covers heating, then it depends on whether the custom in your areas is if the heat is included in the rent.

Where in the life cycle are the major parts of the house ie roof, windows, heat and cooling, siding.

Also to keep costs down we want to avoid running gas lines to each unit and install heat pumps.Is electric heat pump not base board except able to tenants in that area ?

Then, in my second winter there, the heat would go out every 1-2 weeks. 

$625 to $700 if no heat included.

Hello Everybody, I own several 4plexs and each of them has rooftop packaged heat pump AC units.

If it has centralized heat already, why not set the heat at a constant temperature, say 65 in the winter, and install baseboard heaters in each unit so the tenants can up the heat to their liking, on their own dime.

Might tell you if the home isn't being heated enough.

The triangle is very heated right now (I live here despite what my profile says).

They’re heated on a hot surface, usually a nail, and then inhaled through a dab rig. "   not legal...These are condo'd units, where we own several but there are other owners/tenants.