Assuming you are making it would cost a lot.
Any kilt like those takes between 5-9 yards (ummm, math, 4.5-8ish metres?) of wool depending on how deep your pleating is, how big the person wearing it is, etc. In America at least, any tartan that’s not a standard one (Stuart, Black Watch, Wallace) have to be ordered from Scotland. A weathered light weight MacKenzie from Kinloch Anderson is $92 (USD), for example.
So, before you get to the rest of the outfit it’s expensive. At a guess, you’d need 2ish yards each fabric and lining for a waistcoat, 4ish yards each fabric and lining for a coat, and 3+ yards of linen for the shirt.Plus linen thread, silk thread, patterns, belts, leather lacing, stockings, shoes/boots…
Basically, unless you are buying fabric at wholesale prices it’s a small fortune.
You can buy some stuff pre-made at least here in the U.S. You can usually buy cotton or muslin men’s shirts for cheaper than linen (fabric or made), you can usually find waistcoats and jackets made. And the kilt is just a giant length of fabric, so it basically costs the same since there is no “made”.
But, when it comes down to it, it’s the kilt that is going to cost (they do make poly/wool blends sometimes of tartans that are cheaper, but then your pattern options are going to be limited)
Was that depressing enough?