How do i find the approximate annual growth rate for my market? -

I am doing research on starting a business. I plan to have 2 local markets; in my city and a very close and neighboring metropolitan; Austin, Tx. My business has to do with the wedding industry, but a certain niche of the wedding industry. I can also see my business doing well selling online. as there are few that do this service and the ones I have found online do very well. How do I approximate the annual growth rate for my market if it includes four different variables: 2 different cities, internet customers, and my niche?help please!

try Bizstats.comI doubt you will find anything specific by city - the numbers of businesses in one area too small to be meaningfulwhat you need to do is determine is there is already too many competitors for you to be successful