bj bankroll question

my buddy and I are taking a daily trip to a local casino. we agreed to pool our resources into a $600 bankroll and a 50/50 split. since I have more of a net worth than he does, I said that if we deplete the $600 initial bankroll and I fund a new bankroll of $1000 he's not entitled to any of the winnings. he says he's entitled to 300/1600 or 19% of the winnings. any opinions

I think this is pretty simple. You agree that either he gets 50% of the wins and losses on the initial $600 and nothing either way on the next $1000 that is all yours OR he gets 19% of the wins and losses of a $1,600 bankroll.

Lend him $500. Then you are equal partners in the $1600 BR and he has to repay you your $500 before anything else happens.