Should there be a max buy-in for a "friendly" .10/.20 game?

Should there be a max buy-in amount for a .10/.20 home game?
Our usual buy-in is for $10.

A friend of mine is of the opinion that if he is down $30 to $50, (3 to 5 buy-ins) he should be able to re-buy for that amount so he won't be short-stacked.

I disagree and am of the belief that there should be a limit to the buy-in amount especially for a .10/.20 "friendly" home game where the initial buy-in is for $10.

Any thoughts?