No, really, is there no other way to get money? Why is it always a quest or monster subjugation?
That said, he does consider the idea of making and selling medicines, but points out that he still needs the funds to kickstart the business. And I can udnerstand why, in such a world, it may be better to earn the funds himself and not depend on a problematic noble, or merchant, or banker. Let's not forget how Gutenberg lost his printing workshop to his moneylender.
Also, does this mean that Liz is finally safe?