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I agree with all colleagues above, I cant see how your web site will be penalised due to lots of pages uploaded at the same time. However Adding Too Many Pages Too Quickly May Flag A Site To Be Reviewed Manually. This means thought that you will add hundreds of thousand of link a night. Here is the related via by Matt Cutts: http://searchengineland.com/google-adding-too-many-pages-too-quickly-may-flag-a-site-to-be-reviewed-manually-156058 Hope you find this useful!

I might buy or register the domain if it is one that I would like to use. However, if the agent's current site has really good rankings and is accomplishing goals then I would be very hesitant about changing. The agent's name as a domain can be a powerful brand.  If he uses a different domain for his business it splits his brand. I really like keyword domains but they are not silver bullets.  For your example the loss of effectiveness causesd by redirecting all of the links from an established domain could be a greater loss than the gain offered by the EMD.  That means your rankings could DROP! Also, EMDs usually provide ranking advantage for exact match queries - and little if any advantage for every other query. Switching makes the most sense for poorly established domains.... much much less sense as the domain is more established.