First he declines and says that he wont go on an escort mission and a few panels later we see him thinking "oh i thought that going on an escort mission would be good"
I'm not a fan of the "my goal is getting stronger for the sake of getting stronger" mcs. They gotta have some kind of solid motivations and goals to be compelling.
So Ferris needs a decent apply of magic, if Touya has a house in the storage (or could move his mansion in the storage) Ferris would be travelling partner
No fucking multiplayer game would have an item that would multiply your exp 100 times. Even the most money-grubbing greediest publishers from the Israel wouldn't make this item to sell to people. Even they wouldn't make this kind of blatantly shameless pay to win shit