@Maya50
I think it depends on the weather, climate, what you usually do and what the guest expects.
Honestly, I know few people who ACTUALLY change their own sheets every week. In my case, I change my sheets every 2~3 weeks. Currently, I have a long term guest and I usually change the guest bed sheets when I change my own. I do ask my guest at about week 2 if she would like the sheets changed today or if she's okay for a couple days more.
Still, considering they are GUESTS, If I were in your shoes, I'd probably tell them at check-in that if they want sheets changed, you would be willing to change them once during their stay around day 5, and to let you know one day in advance when they want the sheets changed. I also suggest that you change the sheets yourself, instead of giving clean sheets to the guests to change themselves becuase it's a good excuse to go in and check the room condition 🙂
Also, in my case , I provide clean towels throughout my guest's stay. I have a separate hamper for used towels in the guest bathroom so I collect them every couple days and provide clean towels to replace the used ones. This is also a good excuse to pop my head into the guest bathroom to check if nothing is broken or clogged 🙂
These are the assumptions I made when thinking about what kind of housekeeping activities I'd have to do, how often, and what it would cost me to make sure my nightly price was enough to compensate my efforts and cover additional laundry costs.
If you are worried that they will ask for too many towels, I'd just say something along the lines of "I provide X number of clean towels every 4~5 days so please make sure they last until then"
Good luck~!
