FWIW (and following on from our many conversations about this), the answer for you is Job A.
You spent forever and a day bitching to me about how crap your last job was, and that you hated it, and you desperately wanted out of the industry to go and do something you enjoyed. We worked up plans to put in that place, and we spent time figuring out just what kind of roles would get you to a point where you didn't hate work and life in general. To go back to that is utterly pointless.
Put it this way: You were doing a Mon-Fri, 9-5 job that let you spend money and time on your cars, and you hated life. What makes you think going back there is suddenly going to make you happy again?
Unless you desperately need money (and you may well do at this point, which is fair enough) then the only answer is Job A. Job B is going to leave you f*cking miserable and stuck in a dead end again, and then you'll be a year or two further down the line with nothing to show for it once more. I see zero point in that. If you take Job A and don't like it then you can fall back to Job B (or similar) in a couple of years having lost precisely nothing, but if you don't take that chance while you can then you'll be kicking yourself about it.
Do you want a job, or do you want a career?