I totally agree with what you say regarding 'weapons'. They are not, they are, as you rightly say, tools to do a specific job with. A weapon is an object with which you intend to do someone harm with.. but I think it's a lost cause because eve the police, when they come to do their annual security inspection, call my rifles, shotguns and pistols 'weapons'..!!
Stock making, whether for rifles or shotguns, is an art form almost. Any rifle with a good pedigree will have the action 'bedded' into the stock to prevent movement. The art of rifle bedding is wholly from the Dark Side..!! It is such a precise job. You'll be aware of how wind can affect the flight of a bullet (not so much over 100m), for example a bullet shot at 1000m with a 90 degree wind of 1mph will move the point of impact TEN inches..!! Now imagine that you've bedded a rifle action in the stock and it's say 1.5mm out of centre, to the left. Doesn't take much to work out that the rifle will always shoot to the left unless you compensate with your scope.. but someone, less knowledgeable, my never spot the problem and give up the gun as a 'bad gun'..
Stock making.. wouldn't try it.. ever. And the £90k.. well let's just say that every part of that gun will be handmade. Every part. The barrels braised and sweated together, the action/lock work all hand made, the stock born out of the finest Turkish walnut, shaped, polished, buffed all to your personal requirements over many, many hours.
There's every reason that English shotguns are considered to be the finest in the world. The price, and I do admit that they are high, just reflects the craftsmanship that goes into making such fine guns.
Apart from the long range shooting I love, I used to travel to Scotland, Norfolk, Dorset, well really all over the country, deer stalking. I have done a lot of pest control for farmers, rabbits, pigeon etc., and I still enjoy a season on the pheasant. ALL the game shot is consumed either by my wife and I, or goes to pubs etc. We even used to supply a raptor rescue group with fresh meat for their rescued owls, falcons etc.
PS: I have never hunted for trophies.. not my game, not my scene at all.