I have an idea for a website, that's going to take me a long time to develop. I'm affraid that the time I spend putting the site together might be wasted.

Has anyone else been in the same situation?

How do I research whether my idea is a good one without telling everyone what the idea is?

My idea targets small businesses in a particular sector, so I know that my idea has to be affordable to them. The product I'm thinking of is already available as a standalone package, but a bit on the expensive side, especially for the smaller businesses in the sector. My idea basically puts the product on a single website, which can be easily setup for many businesses to use. The businesses would only pay for any business that my idea had generated for them.

The good thing about my idea is that it can be altered to suite businesses in another sector who require a similar product, which as techonology becomes more and more normal, I think more businesses will want this. That's only my opinion though.