I point out the water saving toilets, efficient radiators and row house configuration, the energy efficient windows and light bulbs.

.) -- This 4 unit MIGHT be a good candidate but BOY, we'd be talking 3 floors of replacing radiators with baseboard.

Not cheap when you have radiators to disconnect and run ducts.

I just did this in a 3-unit property that had an old gas boiler and cast iron radiators.

As they are box-shaped we think they are some sort of radiator that partially burned the floors.

You can't replace the fins, just the whole condenser, which is the "radiator" looking part...not the whole unit which includes the compressor.

Someone allowed the oil to run out and the radiator lines froze and split in a couple of places - but miraculously little water damage.When I ran my numbers I allowed for a purchase of up to $30K with renovations of 80K for an all-in of $110K.  

Radiators are hot to touch, not great for kids, clank and bang when warming up.

Drain pumps on both of those are plastic (usually) and will crack when the water in them freezes.Before draining the hot water heater and heating system, the fuel source to them is shut-off.The water heater will be drained.Boilers and radiators will be drained.Not sure about sump pumps - you would want them to pump out water, but if things freeze ...Not a pool guy, so I have no idea about those.After winterizing, there will be signs posted (taped on) all over the place identifying that the place has been winterized and who the contractor was that performed that task and their contact info.

Does this house have forced air heat or radiators?