>>if you say cost could only be the difference and they would both take the same time, why different cost?
>
>It is only a possibility. A .NET app could very well cost less than a VFP app. Depends on the developer and his capabilities.
>
>Aside from that, one developer is building an application in a dead-end language that has a dwindling support capability. The other is developing in a mainstream well supported environment. What would you pick?

Hmmm, I don't see it that way.. Why would support in a dead-end-language be less than in another language. As long as you've got well trained VFP developpers, why would your support be less? Also something to consider is that support is lots and lots more than just tweaking the codebase. I think people are too much focusing on the language a project is written in.