Provide an extra set, and put it in your house rules they must leave ONE set clean when they check out... so you are ready w/ a 24 hr check in guest to follow (as you normally would) that leaves them open to change their set if (like my son threw up at our stay at 2am!)
anything over a week, they need to do their own clothes, so can wash the linens they slept on too.
My place is private, I don't stay while they are there, so they must do eveything, just as they were at home. My home is not a hotel, but an alernative IMMERSION, it is just like Grandma's-and Gram likes to see you come visit, but go after a week stay 🙂