Or something like AWS S3 vault lock. You pay up front and specify the duration. And at that point you can’t even delete the data if you want to. You can remove you’re credit card from account billing, and they still keep the data for the specified duration.
Hibernate and suspend are different. I configure my laptop to suspend for 3 hours before hibernating. That means I can close the lid for lunch or a commute and instantly resume, but if I leave my laptop in my bag over a long weekend, the battery isn’t drained. Does it save much battery? Dunno. A few % over a few days maybe.
If it’s a laptop and you want to be able to hibernate, swap must be large enough to hold system memory, plus a little extra just in case. Other than that, everything depends on the workload. Generally, no. Maybe a few gb in most cases.
I run a single headscale node on one of my free Oracle OCI instances, and connect about a dozen devices to it. No fear of adding friends either, since it’s free.
https://en.wikipedia.org/wiki/Portland_cement