Since you live in Pennsylvania, taking several 3-day weekends over a few months will probably be much easier to arrange than taking an entire week off plus travel time to Arizona to go to Gunsite.
Taking classes locally, provided that the instructors are good, will provide more "bang for the buck". And a Gunsite 250 can still be a goal for the future . . .
Who are the instructors, if you don't mind saying?
You can only learn from experience if you pay attention!