two jobs?

My husband wants to get second job. We really need the money! But if he takes it he will be working 3am - 6pm 5 days a week with only enough of a break to drive from one job to the other. Would you let your husband/be/so do this?
Btw, I have a job, at which I work 60 hrs a week. So this wouldn't be instead of me working.
Update: thanks for everyone's opinions, I was already wanting to tell him no, but just needed to hear some other views. We can find another way. Thanks.