Keeping the min 7 nights will prevent your listing from being seen by people who are searching for 4, 5, or 6 nights.
I find that many people don’t plan exact 7 day trips. One technique I have used to incentivize longer stays is to increase rate significantly and then provide a discount for longer stays.
For example, if I want to get $1000 per night for one week (total revenue of $7000), I will set the per night rate to 2333 with a 3 night minimum.
Then I set up discounts for someone staying 4, 5, 6 or 7 nights as follows
| target revenue | 7000 | for the week |
|---|---|---|
| per night rate to set | 2333 | |
| nights | discount | total |
| 3 | 0% | 7000 |
| 4 | 25% | 7000 |
| 5 | 40% | 7000 |
| 6 | 50% | 7000 |
| 7 | 57% | 7000 |