That makes sense, here's another idea. At my day job the price of your product is perfect. Its an enterprise app that we want to support on all 3 mobile platforms, which we sell for $5k a pop (and another $200k * N in hardware). $600 is actually cheap (though so is my company, so we probably wouldn't pay more than $1k).
On the other hand, at home I couldn't afford more then $200. When I make an app at home, its for my own fun.
Instead of trying to satisfy both situations in one model, have you considered licensing per app? Every computer I develop on has an internet connection, so i'd be okay having to connect to your server to compile. I'd even be okay with having subsets of the framework licensed separately if it means I can get it cheaper at home.
