Making Cents: My son won’t plan ahead for cost of J1 trip

It might seem odd to ask a question about budgeting for 2018 but I want to advise my son on how to prepare for a summer abroad next year.

He is just finished first year in college and is finding the summer back at home long. He has decided to go to the US next year, which I am ok with. He will be 20.

My concern is the financial aspect. He is on a grant for college and we helped out so he didn’t have to have a job during term time.