At Leroy Merlin, you can order either particle boards, or normal wood boards, whether 16mm for walls, or 30mm for the table top, cut to your sizes (as long as they're rectangular), with end faces laminated as well, and all of that at a fraction of the price.

I had a broken cupboard in a rented apartment, and just built a new replacement one for €15. The bureau in the article could cost 2x..3x of this, which is still lower than overpriced IKEA furniture. (Good furniture, that isn't made of cardboard, is overpriced in IKEA.)