I'm taking the opposite approach - managed services all the way, and my monthly infrastructure costs are higher than what's described here.

No regrets. Infrastructure isn't the problem I'm trying to solve. The problem is: who's actually going to pay for this?

Optimizing infrastructure before you have customers is like designing a kitchen before you've written the menu. I launched within 72 hours of starting development and went straight to customer validation. The market feedback started coming in immediately.

Infrastructure costs show up in your bill. The cost of slow customer validation doesn't show up anywhere - until it's too late. That's the number I watch.