You can either set minimum days for booking for all products in the settings (https://monosnap.com/file/UoRtSUh6DvzMPBFJYwP5sWfA0t8otM), or make the price of products for 1 day of booking the same as for two days for certain products.
Add conditions for 2, 3 and 7 days. Sort conditions: 7days, 3days, 2days (the rows above are higher priority). Enter the price per day in each product for each conditions in catalog item page. For example for 7 days = 500/7 = $72