If you print regularly, HP's 6 cent per page, 100 pages per month plan is about the same price as a small black and white laser's drum and toner.
But you can plan full page photos on photo paper with it for that 6 cent too, not just BW documents. I like it, a full year costs about the same as 1 set of XL OfficeJet ink and you never have to try to save money by going BW / draft mode. Just print whatever. Clean the head whenever needed. It's all included.
Yes it is a subscription, but this one is actually useful. And it gets cheaper the more you print, up to small office volumes. We have it at multiple offices on a 300/700 pages plan.
What crazy ass compressor needs 220V 30A? Here in Netherlands heat pump is standard as new gas connections are banned for environmental reason, and most homes heat water and the whole house on 7 kW heat, 1.5 kW electric, or about 7A on 240V.
The backup element which only runs at extreme cold outside is a few kW yes but for hot water we just let it run dry and the tap gets colder, no big deal.
Dedicated hot water only boilers have a 300-700W compressor and sometimes a 1.5 kW backup coil. If electrical connection is an issue, just look for a pure compressor driven boiler.