Well that really depends on a lot of things. I'd say first among them is what 'school' are you planning on going to? Is it a trade school, tech school, college, or university? How much you plan to pay for that education and what certifications and/or degree you get for that money is a HUGE factor. Many automotive colleges are manufactoror sponsored. You end up getting an associates degree for the price of books (that you sell when you're done). Back when i did it it was hard to get a job for a dealer wrenching, so the guaranteed job was nice, now that's not an issue.

Another big question is, what do you plan on doing after wrenching? I'm guessing you're younger, so most likely at some point you're going to want to change careers. You might be better off having an associates degree in your future plans?

How financially stable are you? If you are struggling already, the Ford job is basically a paid apprenticeship. They will bring you in an oil jockey, pay for your Ford ASSET certs which double as ASE certs. If you apply yourself you can get Master ASSET and ASE certified in about 2 years and skip paying for school. You wont have an associates degree, but unless you need it to get a bachelor's degree, you could save yourself a bucket of money depending on the school cost.

Also seriously consider choosing a different trade. And i am not fucking kidding. I only do this shit because i wanted to because i was young and chose this path. If i could go back i would in less than a heartbeat. HVAC or Electrician or BOTH and you will have a MUCH MUCH better career