Home Game This Saturday...advice

[THEE_LIONN]

I'm going to a home game this Saturday. We'll be playing 50NL with about 15 ppl coming. My live bankroll is limited and was wondering what's a good amount I could get away with bringing? It will be from 3pm-early morning next day, so lots of playing time. All the players are rather weak and I'd say 1-2 players are going to be tough.
Also what's a standard interest rate on money borrowed?