Did it work though? Did you achieve unlimited scaling? Because if so you should compare the price to the price of a team of great minds such as in this article, working for 2 years to get a solution.

I bet it still would be cheaper to pay people over Amazon, but I'm curious about the numbers

It worked fine, the problem was our workloads were minuscule and it still cost $3,000 a month to support 50ish users on a lightly used platform.

The same load in a non-Serverless instance was around $100/month.