Challenge: Set up shared wireless broadband for 6 houses

I live in a little gated mews of six houses in London. Fortunately, my neighbours are all awesome and we get on really well.

Currently, we all have separate broadband, phone and TV packages arranged with various ISPs, but I think this is inefficient. My challenge is to find out if it would be possible for the six households to behave like a business and get a single shared broadband line that we could all connect to wirelessly. This should allow us to get a much higher bandwidth for a lower price. I am not worried about phone line or TV at this stage, as we can't really share them.

All six houses are in an L shape around a courtyard. The greatest distance between houses is about 20 metres.

If we were to collectively get something like Virgin Media's 100mb Fibre Broadband, (http://store.virginmedia.com/broadba...and/100mb.html) would it be possible to set up a powerful wifi router in one of the houses, or outside in a dedicated shelter, that all houses would be able to connect to without suffering range or signal strength problems?

If so, what router would you use? Would you set up wireless bridges in every house? And how would it be best secured?

Any other tips much appreciated!