Here is Don Casey's take on blister repair on the Boat/U.S. site: Blister Repair by Don Casey
I recommend both of his books, "This Old Boat", and "Complete Illustrated Sailboat Maintenance Manual".
You may have a real case of boat pox, which requires drying out the hull thoroughly and may require professional help (I remain skeptical of your first professional opinion for not fully explaining why addressing the blisters individually would not work). In fact, I believe any lasting repair will require a thorough drying out of the hull - I would not be surprised if some of the current hull problems might be due to the epoxy barrier coat being applied to a not-thoroughly dried hull. You might reconcile yourself to the idea of leaving your boat out this Spring and Summer for a full repair, looking forward to the Fall sailing season.
In "This Old Boat", p. 353, Don Casey discusses using marine alkyd enamel instead of epoxy paint after blister repair. The problem with epoxy is that it will hold water in as well as it will hold water out. Then you can end up with the problem you now have - water between the gelcoat and the barrier coat.
Perhaps you should get a second opinion from another marine professional. Don Casey estimates $300 a foot for the peel and replace method (in 2006) or $11,100 for your Crealock 37. You might also consider trying to find someone outside of the Solomon's Island market, which tends to be a little more expensive (although not as much as Annapolis or Baltimore) than the more rural areas of the Bay, or Tidewater.