Bass trapping in the corner: as much as you can. Absorbtion/diffusion at first reflection points.
This is the standard advice you see in most posts asking for room treatment help. Every room will benefit from these basic treatments.
In fact, if you go onto forums for people setting up in home recording studios, the advice is much the same.
As intriguing an idea as this service is, if you are going to spend money, spend it on treatments.
If you are inclined to see what your rooms acoustic profile, download REW (freeware), pick up the mic etc. and measure AND graph to your hearts content. Spend some of that $250 on your significant other so she is more likely to tolerate your obsession.