Look at the history of google. Enclosures made of LEGO, and just laying motherboards on sheets of cardboard in shelves rather than buying “server pc”s. This kind of attitude plus the quality of their search, was what got them enthusiastically funded before they had any idea of revenue.

(They took so long to figure out the revenue model that they almost had the money taken back by the VCs, and had a CEO thrust upon them)

Lackracks have been around since the early 2000s at least, probably earlier than that, even. There's a whole range of Ikea hacks that exist (and dedicated websites for them). Highly recommend perusing the wide range of options if you like the Lackrack!