Is there a minimum amount of days to...

Is there a minimum amount of days to rent or can i rent for 6 nights

Most timeshare owners have a one-week interval, but you can certainly rent for six nights. You can ask if the owner will negotiate on the rate, or you would pay for the full week. Once the reservation is in your name, just let the resort know you will be checking in one day late (or leaving one day early).

Owners may use points as well as weeks to reserve, so 1 night or more may be able to be accommodated, including "atypical" stays like 5 or 6 nights or more.