Well if that was me, I dont see how you would earn any money.
Have you looked at the cost of paer towels, tiloet rolls, and soap?
Work out how many staff! On average you will get through at least 1 - 3 loo rolls a week possibly more depending on the No of staff.
However if you can earn even if it is a small amount and that is whhat you are happy with, then go for it.
Dave