Heating systems $30k, Electrical $30k, just the cast iron soil stack $10k.

Box checked unknown, such as central heating, central AC, sump pump, fireplace, lawn sprinkler,  water softener, security system, central vacuum.  

You'll also want to check out major items like the roof and heating system and see when they're due for replacement, whether the condo fees have allowed replacement reserves to be built up or whether they're running it pretty close to the bone, whether any special assessments are coming up, etc.For me, real estate investing is complicated enough already, that I usually don't personally feel that adding more complexity with having to deal with a condo association and its politics and finances, is worth it, but if I was getting a steal, or I already knew the association and had confidence it its players and finances, I guess I could conceivable do it at some point.

Because of this, the unit isn’t calling for heat as often, and a section of piping in the baseboard heating froze, so now the whole unit isn’t getting heat. 

They say their electric bill is through the roof because their heat doesn’t stay in the home.

The thing that I hope sets us apart is that we will consider sustainability is as a principle driver in the redevelopment - so air sealing, insulation improvements, new windows, doors, high performance mechanicals, solar arrays, ground or air source heat pumps, resiliency and resilient spaces (think covid inspired zoom rooms, home learning centers). 

Also keep the heat on at least 55 degrees and maybe open sink cabinet doors. 

Me being the "on call super" will always get the late night call about NO HEAT.

Leave the heat on and sinks dripping?

I'll default to a savvy local like @Remington Lyman to illuminate Ohio specifics, but in general I'd pay attention to the following on investment properties:Sewer line -- these are hidden and I want to make sure they are healthy OR I have a budget for replacement right awayHVAC - have the heating and air units been well maintained?