Okay my last idea, modifying seed started trays: https://www.amazon.com/Plant-Growing-Trays-Drain-Holes/dp/B0058PTK6M/ref=sr_1_8?crid=9XYTXOXCRMSV&keywords=seed+starter+tray&qid=1647965165&sprefix=seed+%2Caps%2C89&sr=8-8

cut off oneside, command strips to ceiling.

Get a couple 10x20 trays, some hemp mats, a led strip grow light, some hydroponic nutrients, some seeds, and you're good to go.

They are 10x20 trays used for microgreens. There is no drain. These plants sit in water all day. The pots are 4.75" square so I can fit 8 in each tray. I mix up nutrients and top up the blue hanging bags and they slowly drain into the trays. No pumps needed this way.

https://www.amazon.com/dp/B0058PTK6M

They are 10" x 20", nice and sturdy. The Jiffy brand ones I've gotten with seed starting kits are real thin and buckle if you pick the tray up by the edges, but these don't.