Exactly. Or in buying perfectly decent cheaper brands. I've seen all sorts of stuff from Suit Supply here for a few hundred bucks that looks good. They also have several different standard fits that you can, as far as I can tell, order reliably in different cloths with no worries once you find one that works for you. AND they have a proper MTM service in some of their branches where they'll measure you properly, and make any alterations you need after, for under a grand even with the best cloth. That's not quite bespoke, but it's close and it will give you three good-looking suits for the price of that Isaia shonker. Even in a cloth with a designer name on it, if you must.
Go on, Noodles, be brave. I think I might even try that myself next time I'm in London - despite my super cheap local tailor (or maybe because...)