This is my area of expertise!
I live in central London, where gardens are nearly non-existent. I have one now (all 8m x 5m of it -- what's that, 0.01 acre? Photos here:
https://www.flickr.com/photos/julietkemp/sets/72157650736608751/ ) but until 3.5 years ago I only ever had a patio/balcony. Lots of container growing!
As per this thread I've even written a book about it:
https://permies.com/t/44119/urban/Juliet-Kemp-author-Permaculture-Pots
(and there's a giveaway here this week!)
I was never very good at keeping track of my yield, but I used to do really well with tomatoes (south-facing balcony on concrete building = proper suntrap), and lots of herbs and salad leaves. Baby chard was a good one too -- I tried growing that in 2 litre soda bottles once, although I wasn't wholly convinced. A little bag of potatoes didn't have a huge yield but I do love salad potatoes. Courgettes didn't do so well as on the 1st floor there weren't any pollinators around and I couldn't get the knack of doing it myself.
If I was starting over, I'd have put more effort into self-watering containers (the ones I had were brilliant), and bigger containers to hold more water at a time. Keeping everything wet in hot weather was the biggest challenge and the thing that I find most annoying about containers.
Technically my balcony garden was illegal/against the building covenant as you weren't supposed to put anything at all on the balcony. This rule that was entirely ignored by everyone and the council didn't seem to care. (My suspicion is that the rule was there so that if something fell off a balcony they weren't liable.) I get the impression that this sort of thing is more acceptable in the UK anyway? I didn't quite have the nerve to take a chunk out of the drainpipe (for the entire building) in order to plumb in a water butt, though.
The Vertical Veg person is amazing on container growing, too -- FB page here:
https://www.facebook.com/verticalveg?ref=tn_tnmn
I do think it's possible to take a permaculture-ish approach to container growing but there are definitely challenges to overcome, and things which just aren't that possible. You're never going to get the same level of "looking after itself" that you theoretically can when gardening in the ground.