Just do not forget about the regulations from the government. It would be good if a project is being registered to a government department that will help protect the project or the gambling business. This will also encourage other users to join for it is not in the form of illegal.
Most users do not like to join in any illegal online betting platform so to start a gambling business, one should consider the legal issues.
Yes, that's important too. I can assist too to help you meet up with the regulatory requirements.