If only casino owners or someone that has been involved in the casino business before especially crypto-gambling, will make a response here, that would be a good reference for you. I think there is the same topic as this before and as usual, no direct response from crypto-gambling owners that's why what you will see here is mostly based on people's knowledge and own ideas.

Reading lots of replies here, I think you know what should you do, for now, forget building and operating a casino until you gained enough knowledge about how to run it and understand everything, especially the overall cost of operation.

You are also referring to crypto-casino here and your bankroll reserve should be mostly in crypto. Your capital might not enough to cover your bankroll in crypto and with the volatile market as always, your decision to execute a conversion from fiat to crypto should be good timing as your funds are limited.