I agree with much of what stigzler said.
Its your cab. Do what you wish with it.
You probably wont get a lot of help here about certain aspects with it though.. because most of the guys here are versed in woodworking,
not metal work.
I have to agree, that metal work can be quite more difficult. Drill bits wear quickly. Large holes can be a bear to cut out.
But its doable... and you can learn a lot of great stuff from the experience.
Also, just because its stainless, doesnt mean it cant be painted.
You will probably need an Angle Grinder, a heavy duty hole cutter, some sharp & tough bits + some cutting fluid.
Or as very least for the Control panel... getting someone to laser-cut the holes.
Also, look online for vids on how to sharpen drills. That, or buy a Drill Dr.
Best of luck on your project.
