The real question though is why you're doing this instead of using higher powered hardware that costs less. Though I would be curious to see the difference in energy use between a raspi 5 and a used all in one office computer that seem to be one of the better options for running a node on.

I went and bought a raspi 4 myself last year before realizing the error I was making. It does work, but for $40-50 you can definitely get higher end machines on ebay these days.