Well when you consider what you would pay in a decent ) or not so decent hotel , where you have to dodge the cleaners, management, nick towels, ect ect
If your supplying towels, wifi,
also its your home so you will be taking all the risks of running a brothel ect So i would want compensating to reflect that,
Do you plan to be there when the other person is there for you own piece of mind ,
will the other person have a key so that they can come and go as they like
Or is it rent the room from 8am 10pm ect
What happens if neighbours find out How will you deal with that
I would set up a set of rules i.e.
no smoking
how to direct guys in /out
cleaning
Payment up front when they arrive or a non refundable deposit of say ?50 before they arrive \
Personally i wouldnt bother with per client but per day and do a min of three days
?1OO a day if they are sleeping there overnight is not over expensive for a good working place where you know your not going to get turfed out by the police /landlord ect I've paid that an more for hotel apartment in Belfast on occasion although its normally around ?80 per night just depends on what i can get at the time