I think every gambler goes through this stage where they want to be the house.  I don't think many understand the effort that goes into such a task.  The costs alone should be enough to deter any sane individual.  Sure, there are ways to do everything cheap and without a license, but that only ensures that you aren't going to have the staff or knowledge to successfully run an online casino.  Most likely you will be hacked and lose all your money and that is if you are lucky enough to not hire a scammer that steals from the inside.

My advice, don't do anything that involves handling real money.  If you're asking about this here, you aren't anywhere near the level you need to be in order to run an online casino.