Sure. Why not? If you have the money or can arrange financing at the point of sale, you can drive away in a few minutes.
Yes, you can work remotely while on vacation in the US as long as you have the necessary tools and resources to do so. However, it's important to check with your employer or company policies to ensure that remote work is allowed during your vacation.
You can buy a car for that much money.
no
Yes
You will need a court order.
Your friend don't need a citizenship if he is just on a vacation.
yes
I had a Norwegian buddy in college who owned a Honda, and every illegal immigrant can buy a car. Cars aren't restricted to US nationals.
If it's a new car, you'll need a valid US address and/or driving license.
They are often less expensive.
In the car crushing yard
Yes, as long as you have the cash.