I forgot to give you specifics about the linen. It's the most breathable cloth that I've ever worn, very flimsy, and it does not wrinkle nor rumples (it probably isn't composed by just linen and silk as advertised by the local shop seller). Think fresco, but, much more breathable, handles moisture much better, not coarse, and without the body. I'm concerned about how it will take the needle, but I've already made two odd trousers with it (you saw the white one on the friday challenge) and it's just amazing, so amazing that I'll give it a shot. Does that information changes how you feel about the hip patches? Yeah, I really like the bespoke process.
The single button is my second choice, I like the look very much, very sport, but, I'll probably go with three, more suitable for a navy suit that doesn't wrinkles, IMO. I's planning to employ the single button to my next linen suit (tan or tobacco) that will be on hold until I've the result from this project.