How many days at The boarding school?

If someone who just got back into watersports and wakeboarding after 9 yrs away, 30 yrs old now, has the basics of heelside w2w jumps down and thats really it, how many days would you recommend that they book at the boarding school or wakeboard camp? A full 5 days or will 3 days work? Challenge of burning vacation days at work. Would like to get as much out of it as he can.

Im sure hes going to need to be stripped of his bad habits as I dont think he ever had anyones knowledge to go off of. Thanks for ur input!