Based on the numbers you posted, I'm guessing that's around an 8.3% interest rate. I personally couldn't swallow that.
For reference, I have excellent credit and am currently pre-qualified for 5.9% through a local credit union. If the dealership won't let you bring your own financing that...
You may see a little bit of accelerated wear. As long as your rear toe is in spec, it will be minimal. I routinely run my street cars around -2 degrees of camber. With 0 toe front and just a bit of rear toe in and don't see camber wear.
What was your front camber?
Congrats on the future kiddo. Patty Peck Honda isn't that far from you and they have a SGP CTR at MSRP + ~$400 is dealer add-ons. I only passed because I want blue.
I have called/visited all of the Honda dealers in the Phoenix area(that currently have an FL5 on hand) and none will allow me to test drive the car. The best I got was one dealer that said I could drive it "around the block" if we agreed to a price and signed a contract. I didn't bother because...