I work for small production builders putting together their sales and
marketing programs. I want to provide the builders with a simple
software solution to track their potential customers and sales. There
are web based services like buildtopia, and builder 1440 that do this,
but they're expensive and builders are notoriously cheap.

If I develop forms for Outlook specific to builders, for the purpose of
tracking customers, am I over extending what Outlook was intended for?
I was thinking of developing contact forms specific to the home
building industry, and then coupling them with something like Avidian's
Prophet, which could handle the sales tracking.

Any thoughts. Before I committ to a project I want to know it's useful.