Casinos are quite difficult to manage because it requires a lot of people to make it work at the same time. I mean imagine being offline and sleeping, if nobody is looking at what's going on, you are going to get abused for user, people will figure out your times and will abuse it somehow.
It's better to have 3 people for each position to have 8 hours shifts at all times (and 2 people at 12 hour shifts when one of them is not available) and that means a lot of people, not just the owner, from developer to designer to staff, the staff needs to be a lot, so they can help with the support. And we are talking about opponents with millions of dollars in marketing, that's who you would be going against.
^Definitely right and this is true.
It is hard to compete with others now, especially those old gambling casinos that already existed in the gambling business.
It needs manpower or staff that can be able to manage and work your gambling casino 24/7, the fastest customer support seems like it is a part of business marketing in gambling, the first thing that gamblers looking for is the CS.
However, if I will you OP just choose a gambling casino that already existed here for how many years.