Hey there! That's a great idea. The challenge with plants of different heights is aligning the canopy (the top of the buds) so that everyone gets the same light intensity without burning the taller ones. Here are my suggestions for an aesthetic and efficient setup:
1. The "Modular" solution: Adjustable pot stands
Instead of a big piece of furniture, use individual pot stands.
The idea: Use black metal stands (like minimalist plant holders) or columns of different heights.
The aesthetic tip: Mid-Century style stands in metal or water-resistant bamboo. This allows you to elevate each plant independently according to its growth.
The little extra: It's very easy to move for cleaning the tent floor.
2. The "Risers" system (Drainage Elevators)
If you want to stay discreet and ultra-efficient:
Product: "Pot Elevators" (black plastic circular grids).
The trick: You can stack some or use high-density polystyrene blocks (painted black for the look) under the saucers. It's sturdy, water-resistant, and allows for precise height increases of 10, 20, or 30 cm.
3. The "Wire Shelving" design
This is often the preferred choice of organized growers.
The idea: Buy a small chrome or black metal shelving unit (like industrial kitchen storage).
The advantage: You don't assemble the entire shelf; you just use the trays and legs at different heights.
Efficiency: The grid allows air to pass underneath the pots, preventing mold and roots from stagnating in the heat.
My tips for optimizing the 1 m x 1 m space:
Water management: Since you're elevating your plants, set up a common recovery tray on the floor (a large 1 m x 1 m drainage tray). This way, you no longer need to empty the saucers one by one: the water falls into the tray, and you can suck it up with a wet/dry vacuum or a pump.
Air circulation: With different heights, air tends to stagnate in the "holes." Place a small clip-on fan directly on the legs of your stands to ventilate the bottom of the plants.
Finishing touch: Use black or gray fabric pots (Smart Pots). Visually, with black metal stands, it gives a very "pro lab" look and is much better for the roots than plastic.
Little tip: If you have one plant that's really too tall compared to the others, feel free to use 90° training clips (LST clips) like the ones I already see in your picture, but more aggressively to "lay down" the tall branches and level the height without adding anything under the others.
I hope I could give you some ideas. Wishing you a great Sunday and happy growing!