Is it possible to modify a Hobie 16 or Prindle 16 to meet F16 class rules?
Absolutely possible.
I believe the best option for an inexpensive F16 conversion is the Nacra 5.0. I think you could put together a very competitive boat for 3-4K. It would be a bit heavy compared to Taipans, Blades, etc, but you know what they say about the nut on the tiller.
