I have a 4-node heater here, but only 2 nodes are in use currently. I got it because it was exceedingly cheap (£75 here in UK and all 4 nodes have 3xE5-2620s and 48 gig ram) but in reality it overkill. Tempted to make a solar powered rpi 5 + m.2 server with battery backup just because I can, but it will be for serving websites both static and worpress