Sancho can play in a 2nd rate league but I've seen nothing yet to compare him to a player like Mahrez who was instrumental in a club like Leicester winning the league.I'd pay the money for him in a heartbeat. We have a natural home for him in the squad seeing Mahrez is not trusted by Pep in big games. As for being too expensive, I agree but we'll probably end up being 75m for a 29 year old defender who had an average year so what does the money even matter.
As for personality and attitude, our best young player was recently caught shagging some random blonde while having a 1 year old baby back at home and being called up to NT for the first time. If one gets benefit of doubt the other must aswell.