You will need a lock box on the stat then, cuz they'll **** with it every 10 seconds when they "think" you aren't looking.
It doesn't take any more time than regular billing. Pin the utility bills on the wall when they are all in, show the math, and say "here's last month's damage, pay up".
Oh, BTW, make a renter mad at you (or not) in the house you are occupying, and 10% of your **** walks out the door with them when they leave.
