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I have a client who has 750 agents. They want to provide them all with a website on a subdomain (mysite.domain.com). The sites will all contain basically the same info, however, this info can be customized on each site by each rep. Most of these reps sell pretty much the same thing, so the customization wont be very dramatic. So the question is, how can we build this replicated website system and deliver SEO value to each site?

My question has 2 parts: 1) Can you optimize a subdomain template site (a company is providing us with a template site they provide many other salespeople, but we can control the meta and content on each page), and 2) Does forwarding and masking another domain to the subdomain in question, hurt my SEO efforts?