It is a complicated process. Building a business in gambling is not that easy as it requires so much hard work and a team of specialists that look into every aspect that could double or half the costumer base. Sometimes you could imitate another already running business if you can change the same model. It definitely needs investment. But for a return which happens to be very big in gambling industry, it is no doubt worth taking the risk. This is the risk that will make you a man with influence over the industry unlike a common man in gambling.
No business is ever easy, not at the beginning. But as long as the bottom line is good, that's what business people are looking at - bottom line. Every other things will come in in-place
A successful business depends on a successful idea, as in this case it can be a successful one. You are providing a platform to gamblers but it is hard for the gamblers to decide gambling with their Bitcoins. You should consider this factor too in order to think for the success of your business. It is fine if you provide gambling with Bitcoin facility but I would say that it is not recommended much. Bitcoin holders will not think for gambling more than proceeding further in Bitcoin investment.