Halp /vp/, I have a Sneasel I really want to evolve on ORAS so she stops sucking and actually learns night slash. I've read you can't obtain razor claw in ORAS at all until battle maison post-game, but I do have my completed save file on X still, I just never played that much battle maison. How long (minutes, hours, etc) would it take to get the 48 BP to buy the razor claw and trade it over?

tl;dr How long precisely would it take to get 48 BP on Battle Maison in Pokemon X?