All things are relative.As poited out earlier the original kilt was a plaid blanket fastened at the waist with a belt, it would be about 4 yards with the top arranged to protect the wearer with a lein underneath. The material for the kilt would have been woven and dyed locally this is were the concept of clan tartans came from. Dyes would have been from local plants and berries thus the colours and patterns would be different from area to area. The kilt would have been removed for fighting and the lein tied under, the crotch to keep it out of the way. If you check with the scottish tartan museum the small kilt that we know today would only have been 4 yards,even in early victorian times then some bright spark figured out that they could make more money selling an 8 yard kilt.
All that aside If you were to go to a tailor and have a suite hand made I'm sure that the cost would be closer to a highland outfit. Most mens clothing today is ready made, made "off shore" and in volume to make it more cost effective. My latest jacket purchased at Hector Russell was not hand made in the UK and cost half the price of a brittish made one.