Ok we clearly have a troll resurrecting old comparison kite threads plugging his business.
J Kiter - do everyone a favor and pay for advertising. Resurrecting old kite compare threads and flooding the stream is only hurting your attempt to start your business.
And for the record, I actually think your idea is decent. Just promote it the right way please - talk to Toby about ads on this site and work a deal with him so you can properly introduce yourself and your idea. I think a demo site and/or kite rental club is a good idea if executed / priced correctly. But If you keep trying to plug yourself like this everyone will hate you even if your idea is good.