How to convince my dad to give me this car?

I know I should appreciate whatever my dad gets me and I do. He already got me a car but that was for winter and now I'm about to get my new car. I don't have money and he knows that I won't start paying for it until I get my summer job but theres this car he bought to sell but I'm inlove with it. I drove it for an hour and it is so amazing. I'm not going to say what car it is because for whatever reason someone might criticize it even though it's a great car. He's selling it for 3600 and my winter car could go for like 1800. He's in a wheelchair and I help him so much but I know a car is a lot. I was just wondering if there's anything I could do or convince him to let me have it that doesn't have to do with money.