Years ago I ran a perpetual where I flowered in a 2x4x5’ tent, all 12/12 from seed/clone. Three batches of eight plants, all in 2L Coke bottles. I “repurposed” a few eight bottle carriers from a local convenience store so that each batch of plants could be moved around within a single tray.
I don’t remember the strain, but it was a quick finisher (9 weeks), so every three weeks I was harvesting eight plants, and at the same time, eight new ones went in.