I do like the White 1, Red 5, Green 25, Black 100 color correlation. I'm OK with the $2.50 green chip for that reason.
For novice players, I don't think there is going to be a noticeable difference between 10-10 blinds or 10-20 blinds. I'm sure most aren't going to size the bets according to pot and stack size. For that reason, I'd make it 10-20, so it's closer to 'normal'.
A $10 buy-in with a 20c BB means starting with 50 BB. Some will balk, I think it's OK, for a novice or social game. One of the groups I play with, most begin with a 40BB starting stack, and only occasionally do people buy in for 100BB+
Without killing a vibe, I'd make a clear and short announcement about rules (RROP) being the basis, and in particular
Quote:
SECTION 2 - HOUSE POLICIES
DECISION-MAKING
1. Management reserves the right to make decisions in the spirit of fairness, even if a strict interpretation of the rules may indicate a different ruling.