New build with recycled parts on a ridiculous budget 120cm*60cm work area

[Zeeflyboy]

In reality your spindle will never pull 2.2kw on a machine with this level of rigidity... most of the time it will be much lower.

Your stepper motors etc also are incredibly unlikely to all pull peak power at the same instant.

I do exactly as neale said... I have everything running off a dual socket (computer, monitor, compressor on one, CNC on second) and i run my vac from another socket (which just so happens to be on a different ring, but would be fine on same ring).

Obviously if you want to give it a beefier supply then go for it, but it's not necessary imo and doesn't really fit with your cheap as chips goals!