Any recommendations for getting soundproofing installed?

[WolfWings]

Already know the product I'll be going with (RAAMmat) since I can get it affordably, but at this point I'm looking at the installation and wondering if anyone out there has some experience doing so? I'm good with mechanical stuff, but I'm actually worried about yanking the interior apart to do a proper floor-pan install myself, since I can't afford to have the car down for more than a weekend due to my work schedule.

Only thing I was able to find by hunting around was a price-quote in the $300-500 range from Best Buy for labor starting at the floor-pan getting layered up and working up to fully sealing the doors inside and out and doing everything but the roof of the vehicle.

So, my two-part question is: Is that a rip-off price ($300 for the floorpan is what I'm oogling mostly) for the amount of labor involved in such an install? And would Best Buy be likely to do a passable job in the first place? I have the stripped no-power-anything, no-extra-ABS, no-side-airbags model, so AFAIK it's as easy an install as can be done on the Yaris.