I'm a big believer in seeing the numbers, maybe this will help. The good news is you're doing fantastic on keeping expenses low, and you're making a great wage for 22. Right now, a huge portion of your income is going to taxes. With 70k gross, $3500 to your 401(k), and take-home of $850 a week, you are paying about $10k to the tax man and $10k for benefits. That's a lot! Let's run some numbers, and consider this:
Assume $20/h base, $30/h overtime, and 60/h week, over 50 weeks (I gave you two weeks unpaid vacation) gives you $70k a year gross. A standard deduction of $10,150 and $3,500 401(k) gives you an AGI of $57,150 of which you would pay $10,138 in federal taxes. I'm guessing this is about where you are today. If you decided to put $18k into your 401k, and $5,500 into your traditional IRA, your AGI (taxable income) drops to just $39,150, and you would pay $5,650 in taxes. That's almost five grand a year you get to keep instead of sending to the tax man. This is a simple calc and you would probably pay a lot less - you'd get the saver's credit, I think, and possibly some other credits, making this strategy even better for you.
At this point you would be saving $23,500 a year, in just five years at 7% growth, you would have a retirement stash of ~$180,000 at age 27, which will grow tax-free. Pretty good! Certainly better than I did in my 20s.
Now, let's kick it up a notch. We assume 70k a year gross, about 10k in benefits, maxed out retirement contributions of 23,500, taxes of 5,650, and expenses of $13k a year, which leaves post tax savings available of $17850. If you decided to invest this amount for five years at 7%, you would have a total stash of $315k at age 27 (note: I didn't calculate the taxable interest you would start generating, so it would be a smidge lower unless you pursued tax-advantaged bonds or something). With the 4% Safe Withdrawal Rate, starting at age 27 your stash would generate $12,659 a year.
Boom, retired at 27.
Want to turn it to 11? Work 72 hours a week instead of 60. I leave this as an exercise for the reader. Happy to rerun numbers for you if you want to provide more detail.