I just calculated my cost for PMF for interior and exterior, $215.24. Now that cost is material costs for full sheets and gallons. There was leftovers which could go into another build. So I would say, guessing, about $180.00 since I have about 1/2 gallons of each product left and canvas for a full wall and end wall. That would be HF canvas, probably in the 10-12 once weight.
I have worked with fiberglass before and I can say I don't like it. PMF is so much easier to work with and less toxic. No figuring out cure rates and wondering if you got a full cure. No masks to keep out fibers, no itching.
Most people don't have a clue about how to fiberglass, but If you know how to paint and lay wall paper, which most people do, you can PMF.