i think it is not so easy and everyone cannot do so. specially in my area where gambling is illegal and therefore there is no permission to run a casino and if a person is running a casino and caught by the police he will be punish for that and wll be put in jail. although some people here running a casino illegally but they have relations with police and other politicians who allowing and supporting them to run a casino illegally.
You can really do everything you want if you know how to hide it . The fact is that there are alot of illegal casino, sportsbetting and other site in the internet and only 10 % of them are legal .There are alot of people that done such thing and hasnt been caught yet. They know what they are doing and you could really do that as well