Seconded, and I'll even add that you can buy second-hand laptops, they even have an included battery that will help you for short outages. But more importantly

Seconded, and I'll even add that you can buy second-hand laptops, they even have an included battery that will help you for short outages. But more importantly, buying second-hand anything is orders of magnitude better than a new Raspberry Pi, because most of the environmental impact is on the building of end devices. Re-using an old laptop you don't use anymore furthers its life. The impact of usage, whether it draws 2W or 50W, doesn't change much on that front. In any case, please stop buying new things, and re-use existing hardware instead of inducing even more pollution.