If you do decide to do it and you cannot get into a top school, I recommend doing it part-time while you keep your full time job, at a cheap school.

Read about tort and LLCs.Umbrellas are ridiculously cheap, maybe because they litigate to death to avoid payments

Large renter base , a good amount of multifamily homes available and the prices are usually very cheap . 

Bought in bulk they tend to cost $2-5 each so it's cheap insurance to keep the central hvac unit from being damaged. 

@Benjamin Storrs I'd say it's worthwhile because they provide protection that other things like insurance simply can't, and they're extremely cheap if you look around (some attorney's offer them for free). 

Blinds are cheap.

It does the job perfectly, but it's not cheap and not available for purchase except for our clients. 

We need a lawn mower for our rental property and I was wondering if anyone has too many lawn mowers to sell for cheap or know of any used ones?

See if he can get a free/cheap booster.

As far as saving on heating costs, if you haven’t already, tune up your heating system it will operate up to 10% more efficiently, and you might be able save more heat by weatherizing the building better: caulk any gaps causing drafts, insulate any uninsulated cavities where you may be losing heat especially between cold spaces like attics and under floors or in walls where the insulation has sunk down or never existed (you can find these poorly insulated areas with a thermal leak detector gun which are only like $30-50 these days), use weather stripping around doors and windows, use storm windows or the cheap plastic window insulating stuff, open any drapes to let the sun heat the home during the day, close closet doors, etc. and turn the heat down to 50-55 (I would get there early or use a smart-thermostat you can control from your smartphone to warm it up before showings though, as a cold house might turn off a renter).