Well, it's good you want to start a Bitcoin business but you need to give more details.
1) What would your site sell? Are you looking for a typical shop which sells everyday items for Bitcoin? Or perhaps something like a news site etc?
2) How good is your knowledge of coding (in particular HTML)? Web design helps attract customers and so if you do not know how to use HTML you will need to pay someone else to do it.
3) Are you prepared to spend money? (Even though this is a Bitcoin business you still need to pay for things like payment processors, domain hosting and so on.