First you worry about meeting your paying customers need. Then you spin up just enough infrastructure to handle effectively meeting the need to continue getting paid.

You can do that with some shell scripts on an instance and an e-mail service and manually copy the whole mess for backup if it makes sense. The how of implementation is very case specific.

Thinking more on it I'd sum up as "provide a service that doesn't require that you be Google". If you start by specifying an impossible amount of infrastructure maybe there's an issue with management :).