I'm in the same boat, using pots because I hope to move soon. Every place I live in is cheap rented inner city housing, cheap because it's crappy and about to be demolished.
Because I'm always on the move and I don't own the land, I CBF improving soils enough to plant in the ground.
Due to soil condition, renting and hopefully moving, I want to grow the best I can in pots . I may just chuck some plants in the ground to compare cared for pots to rubbish soil though this summer. Last placed I lived at, everything in the ground did better than pots, but then everything in the ground got killed by root knot nematodes.
But I'm more confident I can get a decent result from pots now, as I know drainage was the issue with the old pots. My potted plants could either be in perpetual shade, or out in the rain all winter, so they never did well and died off a lot. Hopefully I can have plants that last for years with better drainage and moving them from sun to shade, or out of the rain now.
What is your plan for shading/protecting the buckets mega, you've mentioned it before but not explained. Is it just shading the area, or doing something to the individual buckets?
To everyone else, if I was going to plant in the ground, what's the best place to do it bearing in mind the 40C hot suns we get here in Perth? I have the option of one patch that gets afternoon sun and is near a tin shed wall (that was my winter planting spot), or I have a patch cleared 4m from a tree. It gets morning direct sun, then shaded afternoon sun by the tree.