$35,000 is a huge sum of money. I'm suggesting he sell the 40 or so bitcoin he purchased immediately at market price (~$550), cut his loses and move on. By doing so he would limit the damage and would only lose ~$12,700. Bitcoin will continue to fall and he will continue to lose money.
He won't get his money back from CoinBase and he is losing money every second he holds his bitcoin.
Losing money sucks. It happens to everyone who invests, gambles or takes a risk. Take your medicine, learn for your mistakes and be better tomorrow.