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Hi DeploySEO, It does sound like you're on the right track realizing that content development is going to need to be a major priority here. Don't underestimate the amount of creativity this process requires and deserves - you want to create a finished body of content that your customer love and of which your company is really proud. Wishing you good luck:)!

Hi, No - that's not a problem. Anyway google is good at determining how things are even if you have a lot of duplicate content. And it's important to mention that there is no such thing as a Google duplicate content penalties - manual or otherwise. Panda dose target "duplicate content" but Panda is not a penalty is a filter and it's more complex, way more then "duplicate content" .. but that's a story for another day - anyway with a 500 pages site you are probabaly safe from panda even if you would have a lot of Panda signals... Cheers.