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Eden, You can certainly get away with using the same content on all the sites by canonicalizing all of the to a single main site. That would tell google to count only the content found on the main  site. All pages with the same content on other domains would be rendered non-competitive, which is not the same as a penalty. However, if you want  each  of the domains to be competitive in their markets, they should have unique content--and we're not talking a few changes here and there in the copy. We're talking real unique copy relevant to each  of their locations. There must be good  reasons the company chose the locations it did. Be creative about those reasons and get them down on paper. It's just part of doing business online.  The company didn't just throw up  a facade at each physical location--they shouldn't do so online either. And don't forget your Google my business pages for each location.

Any insights would be greatly appreciated - thanks again Moz community!

Not a problem