I vote Cornwell if the truck is available where you are going to be working at. Weekly payments make it even more affordable and you let him deal with the warranty work.
No offense, but I think that's meh advise for a starting guy. 50/50 chance he's not even wrenching in 2 years, so no need for the pricey stuff when he might be making $2 above min wage.
$20 a week to add up to $500 for a $180 item isn't sound financial advice. Plus I don't trust a dude to take my $20 payments and every month send out the $80. He screws up once and you'll find out a year later when you and your future,wife decide to buy a new car. I've seen this twice.
My advice starting out (from experience)... Buy a h.f cart, craftsman chrome set, h.f. impact sockets, and the cheapest decent NEW impact. I did nitrocat for under $200 off Amazon and years later it's still killing it.
Your co workers may laugh, but they drive a $900 civic or live with mommy, plus they won't legally own that nice box till 2018 anyway. Use your time and finances to get an inspectors license, ase cert, hybrid vehicle training, or something that an employer actually cares about.
And regarding warranty, truck brands give you one. Most others do 2-3. Problems usually show up after a year anyway. Plus, what's so hard about wrapping a gun in a shoe box and going to usps... Don't need to pay a guy to do that.