I would say that according to the 1% average he was doing per day if he is making 0.65 BTC a day, he has only 65BTC. He owes 444.48 BTC.
So according to my calculations he will be able to repay all back in 194 days. x=log(444.48/65)/log(1.01)
So sit down and wait till January 2015. Not that bad.
Based on the refund rate (on average 0,65 BTC / day) and the amounts we were receiving on the btc-arbs platform during march and beginning of april, I would bet our friend will say he's playing with around less than 100 btc... looooong way to recover.