Is there a rule of thunb to use if they dont have a set min/max buy in for a NL game.

Ex. bellagio offers 2/5nl $200.00 min/max.
But i've seen some casinos open a 5/10nl game.

Whats the rule of thumb for what you need to sit in nl games?

Is there one?

I understand limit, 30+BB and what not.

How about NL?

Thanks!