First get your engineer on it, then:*Mount your laser level in a spot where hopefully it will be visible in at least a few spots (duct work in the way)*One ton bottle jacks to lift to exact spot quick (Expect sheetrock repair upstairs).

When the fans attached to the motors get old they can come off axis as they are spinning off level.

I will look into putting in electric heaters, putting in propane wall mounts, and getting separate boilers and oil tanks for each of the units.

There is, however, evidence that dirty heating and cooling coils, motors, and air handling units can make your HVAC unit less efficient.http://www.todayshomeowner.com/hvac-duct-cleaning-...

Anything that has a motor goes down in value.

There are extension cords being used in a permanent fashion running from the basement and through the house to some other rooms to provide more electricity in those rooms, and there are mounted power strips to provide these extension cords with power.

I think it takes a lot to "move a toilet" however perhaps it was an older device with rusted mounting bolts? 

The mounted stainless rod, if damaged at all, is tenant damage and I charge repairs to them. 

That is a vented usually wall mounted heater.

Now if you have a year or two to travel to all these places  you can check them all out in person and figure out what works for you..Maybe rent a motor home and drive the entire country.. spending a few weeks in each area to see if you like it.