BTW. I am always interested but
My software has always been for non-consumer use. Mostly embedded apps (no windows) and setup tools for industrial controls.
Such work has always been done with hard estimates and the one thing that none of this software does have is any shiny graphics. Yes I do have some apps that deal with images but again nothing glamorous.
I wonder about the issue with team size and costs.
PS. Recent post about estimating.
Do you have your "spec"?