Advice for business ideas?

A friend and I are considering starting a business venture. We both left college looking for a job within the public services sector. However due to the economic situation and in particular the cutbacks that the government are planning,especially for the police etc. we are looking to do something else. From article I have read it seems a home based business it best to start. We have had some ideas based on our interests. We are both keen sportsman and in particular football as along with our education knowledge. One idea was on-line sports clothing and equipment shopping and also buying into franchises. Is there gaps in the market for this? We would probably have around 6 thousand to start with but will probably have access to more investment should we need it. Other interests include property development, fashion and outdoor activities. where we lack in experience of entrepreneurial skills we had bags full of determination and our quick learners. We know that it takes time and a little bit of luck to make a successful business but it is something we are willing to work at for however long it takes. All advice welcome. Many thanks