I've been doing free pentesting on a lot of the new casinos posted on here, and I've noticed that at least 1 in 3 will have major vulnerabilities.
Please do NOT launch a business that operates with other peoples funds if you have no idea how (An example) basic input validation works.
If you are serious about your casino, then please do look into hiring a professional pentester.
Had to get this off my chest as the amount of new casinos with shitty security is skyrocketing.
This also serves as a PSA to users; Please use your brain when picking places to spend your hard earned cash. You might end up with nothing because the sites bankroll got ripped.
Personally I like your advice. Some people would come here and asking of other people to invest in their new casinos to share the profit. Someone that is not even good in managing a company or a business would come and tell people that he wants to launch a casino and he needs help. Those Casinos that are poorly managed are the ones that are causing the Casablancas in the online casino system, and scamming gamblers here and there.
Using people's funds be a loan or contract is very bad because if the fund you borrow got lost in the process then you have enter into double problem. Therefore I also join the op to warn those who are interested to borrow money from other to launch a casino. And also use a professional casino creators to creat your site.