i will say i'm not a fan of wal mart, except when something goes wrong with my car at 3am and i need a place that is open.
someone once told me that one of the reasons kilts were so expensive was the copywrite of the tartans. taking that out of the equation if they were mass produced i see no reason they wouldn't be about $50.
as far as quality i think it wouldn't be much different than say dress pants.
sure you can by a pair at wal mart for $25 if you need to but they'll never fit you like your wool, silk lined, tailored english suit pants.