Minu doesn't have his own money, it's his dad's wealth and his father isn't willing to help vinny. I remember minu and his father having a convo about it but he didn't agree. I think minu would be able to still convince his dad but vinny wouldn't accept the money. Vinny has an inferiority complex and getting money from his friend would make him feel worse. I mean, u can't help someone who doesn't accept ur help. I hope they find a way tho...

Why doesn't he ask Minu for help, he is rich and can even lend money for the treatment if Vinny doesn't want to owe anyone