Best way to drill/put 2 5/16" holes in sheet metal?

[Rileys68Camaro]

I'm looking at trying to make a guage panel, depending on what it will cost. If it's spendy, I'll buy an Autometer.

So, how would I make these large holes in a piece of sheetmetal? Can I use a hole saw on my drill?

Would it be that expensive to have a shop put a 90* or so bend in it and drill four holes?

Thanks!