I have my rack equipment on wall mounts - so they hang vertically and don't take up much space.

(They sell, I think, 1-4u on Amazon.. I have a 2u and a 3u and they're very sturdy and you can just hang em anywhere!)

You can see mine in the bottom right, here: https://www.reddit.com/r/voiceover/comments/10j6xvw/i_completed_my_vo_booth_today_ama

Here's the 1U: https://www.amazon.com/gp/product/B09F2DX3TK