Excellent news, have you read the pitfalls of wedding photographers on Lensrentals.com.....it's meant to be humorous and I am not trying disuade you but you could use it as a tool to know what mistakes to avoid. Extreme preparation is the key, you already know how to get images....you will just need to meet with client, go see the venue(s) and develope a detailed plan of the images they wants and what it will take to get them. You will need a relatively wide angle lens that can shoot in low light as well as a medium telephoto. You might be able to build the equipment rental cost into the contract as well as the cost of an assistant. Go for it!!!!!!!!!!!!!