I wondered if there was a way to set the accommodation to only be booked out for 3 nights, 5 nights, and 7 nights for set prices. It doesn’t matter what day they check in but they can only stay for these nights, not 4 nights or 6 nights. I have tried in booking rules but can’t seem to figure it out, I can set the max to 7 but it’s the other two causing a problem.
Taking into account that guests may check-in any day of the week, such configuration is not possible, as the first rule in the rules list will have the highest priority. The only way to achieve a similar configuration is creating three different seasons applied to different days of the week, and then configuring min-stay/max-stay booking rules for corresponding seasons. You may find an example of how it should be configured in this article.