Not only that, some things like monitoring you get for free on cloud providers and setting up your own HA stack is going to be significantly more expensive.
There's almost no testing and validation needed for something like AWS RDS Postgres backups. Occasionally you store an instance and that's it.
Other things like Postgres out-of-disk-space is a 10 min fix on AWS to increment the assigned space. If your VM provider is offering SAN/NAS you may be in luck, otherwise hopefully you have a balast file or some logs you can delete to free enough space to get things running long enough to fix the problem.
