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Even though you have gather some good information but you should include how much time will it take to build such a site and also what would be the estimated cost of this setup and of course the ROI ?
Yes, that it will help too so we can prepare the money for setting the website. Don't forget about choosing the good hosting because you don't want to see your site will get offline in anytime, right?
I think it depends on how many games he wants to be available in the site and if there are only less than 5 games, I think it would not need too long to install and prepare the site.
I am sure that every gambling owner website will think about that step. The domain will look like a legit and recommended site if the gambling site has a brand name especially if there is a gambling license.