I'm leaning towards a medic character and thinking of making him a student who was booted from medical school before finishing (maybe drugs, maybe cheating, have not yet decided), hasn't been able to get any work since, has been struggling to keep up with paying fees and is largely disowned by his parents. Has the right skillset and nothing to lose. Sound ok? If not I'm still confident of the medical idea, maybe a Vet as an origin instead.