I'm also 20 years old, but live in GA. I started establishing credit at 18 and now... well. I walked in... pointed at my Koup and the dealing began. If you have established, excellent credit... They will work with you. I put nothing down and I got it right at MSRP with taxes.
Seeing as how this vehicle has a 10 year, 100,000 mile warranty... whether you do a 5 to 7 year loan is up to you... but as long as you don't drive over 10,000 miles a year, you're in the clear in my opinion. You won't find any other vehicle with that kind of protection. Think about it... you want the warranty to last until the loan is paid off, right? Why be stuck with major repairs because your cars warranty expired at 32,000 miles AND the engine went bad at 55,000 miles... and it took you 5 years to pay for it?
Btw, I financed it. Not very many people can just walk in and throw down $20,000 cash for a vehicle.