Nevetherless it was an interesting read.
You mention a "few weeks" of development and testing. How many few weeks?
Well i've run the email server that is now the second server for nearly half a year i think. Developing the site, creating tests and binding it to the email server maybe took 2-3 weeks. It is hard to tell because i had the landing page and backend developed shortly after the first test server was setup and then finished it much later within a little more than a week (i think, i tend to underestimate these things :).
To be fair: I've used my own Rails template which saved some time and i've reused a lot of code for stripe from a different project as well.