If you want to sell your rooms only full weeks and with check-in only on specific weekdays you can easily do so by following these steps:

1. Go to Settings -> Availability -> Stay days & length and click “New adjustment”
2. Indicate the date range and weekdays when this setting should apply
3. Unless you specify a particular room type, this setting will apply to all room types
4. Set the minimum and maximum nights allowed to 7
5. Under “Choose here”, select to accept only full week bookings

When you’ve done the above, continue by following these steps:

1. Go to Settings -> Availability -> Stay restrictions and click “New restriction”
2. Enter a name for the restriction and indicate the date range when the restriction should apply
3. Unless you specify a room type, this setting will apply to all room types
4. Under “Blocked days”, choose the weekdays when check-in should be closed, for example, all days except Saturdays
5. Check the box “Check-in not allowed”