I was about to point out that this is a 5 year old thread but what the hell, it's still got merit.

Quote Originally Posted by Justloadit View Post
....
The cost of development is small when you start to compare it to the cost of marketing the item, and selling it.....
Wise words indeed but not just the cost it's the work also.

It's amazing how many guys have invented something and just assume it will market itself and the customers will arrive at his garage or workshop and form a nice orderly queue whilst he tries to keep up with the demand that's organically growing exponentially in front of his very eyes.

As you say the cost and the hard work begins only once the product itself has been developed.