Having enough funds shouldn't be the only thing to focus on. Putting up a casino isn't an easy thing. It would require your skills and knowledge of this business and be honest, establishing a reputable casino will be hard if you can't meet the standards of most players. You have to make sure that you're also able to meet all the requirements needed to run a casino and where to get trusted people who could help you run this business successfully. You could risk a huge capital but you might lose it if you are not knowledgeable enough about what you are doing.
and there's marketing that is an endless spending of money for the casino to stay visible to users. you have to have deep pockets to make it. influencers are not asking tiny amounts of money to promote a casino. the casinos that made it to the top and stay on top for long spends tons of money for its promotion.
the 100k initial capital OP is saying is probably just putting a casino up and running. getting it to be successful is the most challenging for it needs more funds.
OP, Trying to start up and run a casino is no easy feat. There are hurdles and I mean a lot! Starting from your license to enable you run to full time marketing. You need to make your new and unknown casino known and that is no easy feat. You would have to spend a whole lot of money to put yourself out there. Not forgetting that there are old, reliable, trusted and known casino out there who would definitely be a competition to you. You would have to offer madly attractive promotions and services and all that requires money. Obviously, you couldnt handle all that by yourself and would need to have a staff working either full time or part time.
If youve got $100,000 to play around with, I would ask you think really hard before you put up a casino.