Give him and his friends tickets to a soccer game or some bar. Any man would appreciate such a gift. Go out with your friends. After that, you can meet somewhere and go out together. But I can't tell you about the spicy stuff, I'm pretty conservative here.

Don't you have a credit card? Then the bank may sooner arrange the next loan. In general, I do not know, maybe it is better to ask for help from family or friends? Because there are so many procedures at the bank that it is unlikely to speed up. But I had no experience

For me, it's better to take your time and collect the money for a new car. That way you will have fewer problems with repairs in the future. But this is just my opinion. I just don't trust people and I'm sure the seller will still cheat and not tell the whole truth about the car.