As I mentioned in the post, my money budget is around 1000€ as a target, but it extends both up and down. I can stretch if needed, but if that's comically overkill then I'd be happy to go lower.
Time budget... not too high, but also not super low. I can certainly spend a day or two setting everything up.
Electricity costs are certainly a factor, power prices here were some of the highest globally, even before the extreme increases lately.
Also thanks for the tip of the S3 backup, it's probably a good idea to have an extra copy of important data off-site, yeah.