Ah, mixed responses!
This is why we're in a debate. Not an angry debate btw, very much a good relationship with the hosts, they're really lovely people. But we have different views from a cleaning business perspective, a hosts business perspective and a guests perspective. And there seems to be no one perfect way to please everyone on this particular subject.
Personally, if I was a guest staying for 2 weeks, I'd want 4 bath towels leaving per person, and at least 4 hand towels per bathroom. Because at home I put clean set of towels out for each of the family twice a week.
But some believe just one bath and hand towel a week is fine.
One set of bedding per bed per week is agreed on though.
I also wouldn't want a cleaner coming in while I'm trying to enjoy a private getaway... But some people don't mind that!
However, as a cleaner, I don't like doing midway change-overs. It's super difficult to do an efficient job when people are in the property because they get in the way, or want to chat, or don't want to vacate rooms when we need to be in them. And you can't tell clients they MUST go out when the housekeepers arrive. It drags out a change-over for far longer than it needs to be, and there are other time-slotted cleans elsewhere we need to attend to.
Also, I can't always offer a set time that's convenient to the guests for a midway changeover (so, as a pp stated above, they'd want one on a Saturday between 11-12). We have lots of other jobs and clients. It takes an awful lot of coordination to fit everything in to a single day, including driving through a busy area often clogged with heavy traffic, so strict specified timeslots requested by holiday let guests are really hard to accommodate.
Cleaners also risk being accused of theft when guests are in situ at the time of a linen changeover. I've been accused of theft twice before. Each time the item was located and it was obvious the client had just misplaced it (found on top of a clients car roof for example - realised she'd popped it on there when getting her baby out of the car seat). Even though it was proven I didn't do it, the stress of the accusations were horrible and I never actually received any apologies. So I just don't want to risk putting my business in that position again.