That’s what I’ve literally just traded up to from a Pi. Prodesk 600 G3 comes standard with a 6 core i5 8500, has 4 full size ram slots, an m2 ssd slot and has a mount for 3.5” hdd, all drawing only 65w.
There’s a low profile one as well but then you’re stuck with sodimm, no space for a full size hdd and no pci-e slots.
I picked it up second hand for NZD 100 so I imagine it would be even cheaper in the states.
But we should totally trust Recall because MS is committed to security /s