Below are some variables I value when deciding how to create a prototype. Please add/respond/devalue. Thanks in advance for your feedback.
Functionality: Not perfect but works as intended
Deployment speed: I would want all the (inexpensive) tools that will make my deployment faster
Legal ramifications: If I go OSS, will it screw me up past prototype phase?
PAAS: Do I use one to save time, if so which and why?