Starting a cash home game

[Abu Turab]

A bunch of us all play in a monthly NL tourney with a $100 buyin for T1500 chips. At the end of the night the most you're out is the $100. Now, some of us would like to start another NL game but this time playing cash, say NL$100 max buyin, 8 person game. We have been trying to figure out a way to keep it friendly in regards to capping the amount someone can rebuy thus limiting their losses etc.

I wanted to start at NL $25/$50 to test the waters but others felt that given the buyin, people would donk it up.

Any suggestions?