... A handshake from each of you would usually be an indication of a sealed agreement. In this case, I suppose it would serve as a form of payment as well.

[ Since handshakes aren't... okay, he's more used to gripping forearms, but handshakes are easier, simpler in this world context, and also about the limit of casual contact he'd want with anyone he doesn't know. Ergo: he's not looking to make much money off this, but he's not doing it for free!

It's also him checking to see if these teens are willing and capable of coping with the bare minimum around here, doubly so when handshakes are, by their nature, brief affairs. Blessedly brief affairs. ]