That's not a low cost solution though, and hard to just turn off the cost when you're done with your day

That's not really how Hetzner's dedis work: you typically pay a setup fee (that's about 1/2 of a month of usage) and you have to cancel a full billing cycle (usually a month) in advance. You're meant to run them for months/years at a time, not just spin them up/down on-demand.

> hard to just turn off the cost when you're done with your day

Yeah, but the same is true of OP's Hetzner machines.