I've got the perfect hat... He could actually buy 3 Wanhao D7's for his budget. Already shipping. This just doesn't seem like an Anet A8 kind of project to me... For FDM I'd still be looking at something much more serious than anything recommended so far. Even an original Prusa i3 MK2S would suit better, and within budget, and can add multi-extrusion and still be well under.