It is a great choice for a business indeed. I have to say that the most important part of every online casino is the platform used in it. I have dealt with the one I found at www.softgamings.com/online-gambling-software-providers/ I think those software provides are good and comprehensive to beginners. Check those out too, maybe you will find something interesting to you there. Good luck with your idea, I think you will do it!
Online gambling can be pretty profitable if you know how to treat it properly. I don't earn money on it yet, I just play for fun on mr.bet/casino/new . The games are very funny there, that's why I spend 1-2 hours every evening on that gaming site.