Regular maintenance schedules (water heater flushes, gutter clean-outs, furnace and a/c filter changes, etc) would be a plus.  

Your tenants will flush whatever they want, look up what bolimia does to septic tanks and imagine that happening to your septic (it happens, I know from experience!)

Low flush toilets and LED lighting can shave money off the bottom line, but new plumbing fixtures also ensure there is no deferred maintenance to come up.  

The trend for me right now is to wait and see where the market goes.I am flush with investor cash so when the time is right I will deploy capital.

Let each one drain separately and flush with more hot water.

You need a flush valve kit.I'll be honest, every time I've replaced a flush valve kit, I've ended up replacing the toilet.

I find it much easier to get an reasonable deal off market (especially if you aren't flush with cash).

Hi Bruce,Yes, and flush the toilets and run the water in every drain, including floor drains.Open the windows for a while to air it out.The water evaporates in the traps and sewer gases fill the house.Don't light a match or smoke inside until the house airs out.Also be there when the water comes back on and look at, and listen (at the meter) for leaks.Good Luck!

There were several times worth of toilet clogging and unable to flush (the plumber found a toy in the P-Trap and newspaper the other time).

This is the simplest method, but it also means your tenants are more likely to abuse the utilities by leaving windows open with the heat or A/C running, leaving lights on, ignoring the toilet that constantly flushes on its own, etc.3.