We’ve been working on the Mustang at home with basic tools to demonstrate how to tutorials for the DIY. However, I did decide to buy a cordless saw to see if it works for cutting metal parts. If you have an air compressor I would recommend the air saw because it is smaller and a little easier to use. If you do not have a compressor, the cordless did a good job too.
I did replace the right quarter panel and outer wheelhouse using a seam buster and grinder to make my cuts. So it can be done without a saw, but it sure made the job easier and makes more precise cuts.
Just a tool for you to consider, if you are a DIY doing this at your house without an air compressor.