I don't know if this is a possibility for you, but here is how I financed my car. I put down a $2000 down payment, no trade-in. I am listed as the main owner on the title, with my dad listed as the co-signer. We both figured this would be the best way to go as I got a good interest rate on my loan with him as a cosigner, and I still build interest in my name because I am also on the title.
As far as the insurance went, my dad was paying for the insurance on my previous car, a 1994 Taurus. We agreed that he would continue paying what he did for the Taurus, and I came up with the extra money that came with buying the Mustan. In the end I think it worked out well, and would recommend you doing this if possible. I build credit, yet still got a good interest rate...
This is also a very good idea.