This is my set up. The laptop screen is not the main event, so hides behind the big monitor.
My speakers are not too high, just sitting on the vertical racks. The screen sits on a Stagg height adjustable speaker stand.
The mixer sits on a board, on top of a fixed width/height Z-stand I've had knocking around for ages.
You should consider using a Z-stand. I have others for keyboards, Hercules andd Roland, which are both height adjustable. The Hercules stand goes narrowest, and is good for
narrow keyboards like mono synths. The Roland Z-stand goes much wider, and may well suit your purpose.
The Stagg monitor stands are cheap and versatile, and sturdy. They have a strong triangle base, which you can partly see on the floor, beneath the mixer. They let
you put whatever you want at whatever height you want.
The other one is behind us in the corner, with a Poly-D perched on it.
I've looked at off the shelf desks, but they are fixed configuration, and don't seem to do what I want, and are expensive.
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