Also I would be worried about the insurance and if something just happens to go wrong on your 95% portion.
it's certainly a worry...I just got rid of 3 ATV's partly for that reason.
at first it's parent & kid on the ATV....
30 mins later ya see kid without parent fly by on ATV.
parent will $ue you for their irresponsibility if their kid gets hurt.
my ATV's stay in the barn under "not working" banner when guests are present