D&D 5th Edition – Gambler Prestige Class

I am working on a Gambler option for my Wild West campaign, and I started with an idea for a Rogue archetype, but then I worked toward a Prestige Class. That way it could be an option for any class that meets the Prestige Class’s requirements, and be useful outside of my campaign for other people.  These are my first notes on building the Gambler, and I began with a few requirements, and then the core mechanic of Gambler’s Luck. Let me know what you think.