Hi,
I will gladly help you with your AWS infrastructure. I think that my experience with AWS recommends me for this job. Right now at my job, I am currently managing an infrastructure with more than 800 instances with a focus over high-availability and service uptime. From your descriptions I think that the peering process can be automated almost completely.
If you have any questions regarding my experience, please do not hesitate to contact me via email, or Skype.
Regards,
Alex