Pay once and get full access for life!...
I am doing this because we are currently converting all our feasibility applications to web applications.
We strive to be the one-stop resource for everything real-estate. We are constantly developing new applications to add to our suite to achieve that.
And when you upgrade, you get access to all those new applications & you help us keep developing.
If you don't want to commit, the annual Lead Developer Feasibility Suite subscription is still the best value in the market.
Either way, you win.