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I understand the issue, however, you are going to create a lot more issues that will need more help by going this route. It's much harder to go back and try to fix things after the fact, especially since just managing a site introduces a whole separate set of issues that will require your resources and costs. I inherited a situation like this and it's probably cost us more in lost opportunities than it would have to build it correctly. Off soap box now. The no index is a good start, and focus on the main pages you really need to care about to get visibility for and make sure you follow best practices for those.