Hello @Lyndsay2,
One option would be to use the "Check-in day" setting and set it to Saturday.
You have a 7 night minimum stay. With the check-in day set to Saturday, as above, guests can check in only on Saturday but they could, for example, check out on the following Monday week. That is an 8 night stay, leaving you with no one staying on the Monday to Friday nights.
If this OK with you you can set the check-in day as follows.
1) go to your calendar
2) click on "Availability settings"
3) scroll down to the "Trip length" section and click on its "Edit button"
4) click on "Add a requirement for seasons or weekends"
5) click in the "During" box and then on "Specific dates"
6) add a start date and end date for when you want Saturday only check-ins by clicking on DD-MM-YYYY
you can set the end date to be months or years in advance but remember to change it when that date arrives
7) set the minimum nights stay to 7
😎 set the check-in day to Saturday.
9) click on "Save" and then on "Save" again
Steve.