I won't quibble over 8200 dollars for the Milwaukee Panel Saw which is only (!) $1800. BUT, they are notoriously out of square by about 1/8, usually. Also, if the Depot person is using the tape attached to the saw, forget it. That's another 1/8 to a 1/4 and my local shifts the tape to make sure all the cuts are too big rather than too small, Fewer returns that way.
You can live with all that if you square up carefully during assembly and never allow a panel to stick out past the end of an adjacent side. EAsy to pare an end down to a panel, PITA to sand down an entire panel sqaure to an end.
To the other lists of tools I would add a couple of Jorgensen 3/4" pipe clamp fixtures and 60" pieces of threaded end black pipe for them. That's how you maintain square while you drill and fiddle."I'm your evil Uncle Ernie....Fiddle around, fiddle around........."