No not at all, code is especially cheap, almost worthless. He/She already knows how to do that - so don't waste time on something you already know. Focus on:
1. Ensure there is market / product fit
2. How long to get to develop the product
3. Break-even point
Or write a bunch of code, and be left with another if-I-build-it-they-will-come FAIL.
Obviously you need both, that's why I'm suggesting the focus should be on the biz.
I disagree that it's rare or expensive, it's quite the opposite. Most knowledge associated with it has little lifetime value and is constantly tending towards zero - a 5 year old code base that generates little income has a value of near zero or is a liability. You can hire an engineer for a year to build web apps, depending on country, for the price of a medium sized sedan.
