703 Owens Corning rigid fiberglass panels come in 2’ x 4’ x 2” thick panels.
using the supplies I mentioned before, Including mounting hardware was less than $500 Plus my time and labor.
The only Thing I would’ve done different is I would’ve gotten two cases of Owens Corning fiberglass panels and made some of the panel panels 4 inches thick for better base absorption. Alas, that is another project for me in the future.
Even if you were to consult a professional, he’s gonna have you start with some form of this set up. I looked up GIK acoustic panels and they start out at $120 each for a 2 x 4 x 2“ panel. Sure the first one you make isn’t gonna be as nice as theirs, but the learning curve is really low and by your third one you ain’t gonna be able to tell the difference between who made it. Just put your first couple ones kinda out of sight. The rest will impress your friends, people Have often commented to me how nice they look.👀
if you’re lacking in the DIY gene, I would still use a local upholster and or cabinet maker would probably still come under GIK asking price, a lot of their cost comes in shipping. I could be wrong on this, but then I’m one of those let’s support the local economy.
Good luck in your journey, but I can’t stress enough doing this simple step Is the path you need to follow!!