For the liquidity part, I'm still tinkering with what the right amount seems to be.

You can base the initial odds on what public sportsbooks are posting, but it'll be expensive because you have to put up enough sats to cover the extreme longshot cases.

We were talking about how it's probably best to leave the really big markets, like Stanley Cup, for Predyx to make themselves, because that removes any concerns about trusting the user who made the market.