Order of Operations - Cab repair/sandblast

[dag19]

I would like a little expert insight on what the proper order of operations is when it comes to repairing the rusty cab corners, rocker panels, and floor sections. Should one sandblast the cab down to bare metal in order to see all the rust first? Or should one just get out the grinder, clean up all the paint, and start cutting out rust and replacing panels?

Ultimately, I would like to get the cab down to bare metal with a wet sandblast so I can prime and paint the interior. It might be 3 or 4 months time during this whole process. Let me know what route is best!