Mustang build vs buying new. Should you build your mustang or take that same amount of money and put it towards purchasing a more expensive new car? What do you guys think? This is my 2021 Mustang Mach 1 with the handling package and for many people they would rather build their own car. What would you rather do? I think it would be equally expensive to reproduce the Mach 1 with the handling package which would have a lower resale value. Plus you can make the care in payments, allowing you to not lose all of your cash up front. What do you think?!