@Kira32
In that case, would it not be better to simply state that there are no kitchen facilities for guests (for the time being) or do you think your guests would ignore that and use the kitchen anyway? The problem is, if you really don't want them to use the kitchen, some might feel that it is worth paying the extra fee (think how much more it would cost them to eat out all the time) and you would be left with the issue of having to share it anyway.
I'd be interested to hear how it goes with the kitchen fee and if it does indeed deter guests from using it. I doubt that would work here in London where cafes/restaurants are so expensive, but supermarkets are relatively cheap.
I agree with you RE the laundry though. It drives me insane when guests show up wanting to wash a pile of dirty clothes they have brought with them. Personally I find it rude, but I am sure they don't see it that way!
So, a long time ago, I decided only long-term guests would have free use of the washing machine and that I would charge a small fee to the short term ones. That mostly worked out okay, but there were some guests who seemed genuinely shocked by it, even though it is clearly stated on the listing.
I still have some long-term guests who over use the machine, i.e. putting on a wash every other day for one t-shirt and a couple of pairs of socks or, recently, the guy who put the machine on a high temperature, 2.5 hour wash (this is before drying) for less than half a load. So, I think I will have to introduce a rule to limit laundry to either one or two loads a week max. after which there will be a charge. Hopefully that will make guests wait until they have a reasonable amount of laundry.