I commented a bit here with the architecture post: https://www.reddit.com/r/programming/comments/468p2m/stack_o...

But a better answer is: that price keeps changing. We now have a lot of AWS and on-prem experience in house to do a great post. We'll be doing a lot of research and proper comparisons as a huge part of that upcoming post: https://trello.com/c/4e6TOnA7/87-on-prem-vs-aws-azure-etc-wh...