To be fair, they did say "a bit more self-sufficient". I have a half-dozen raised garden beds, herbs and fruit trees on a very standard-sized suburban block. I can cook occasional meals that are largely from the garden and definitely supplement staples (protein, pasta/rice from the shop). In recent weeks, I've paid more attention to sowing seeds and looked at adding chickens. With reliably laying chickens, we could do a meal/day at least.