Look at the market carefully.
I got a pre-war commercial Colt customized by Armand Swenson for half the price of a similar condition untouched pre-war commercial Colt.
The values are not additive.
Meltdown says carry gun to me so if it has a lot of holster wear, deduct from the value.
The other thing about buying a custom gun is make sure you don't want to change anything or it's a configuration that you believe will hold value with the widest segment of the collector market. If you turn a custom made by a well known smith in to a mix master, all the custom value disappears.
To me, Clark Custom is a big name and Armand Swenson is also. If you're not familiar, Armand was old school, designed the Swenson style ambidextrous thumb safety, one of his signatures was putting S&W adjustable sights in a 1911 slide and he taught John Jardine gunsmithing who is a master in his own right and responsible for the Valtro 1998A1 which many believe to be the height of 1911 pistolsmithing.
Without the history lesson, a lot of people have no idea what it is. Clark might have a little more name recognition because I think they had a line of carry sights and other parts. Also, "Swenson" has become a brand of cheap pistol parts recently, probably because no one thought to copyright Swenson.