Containers. When it's nice out, they live outside. When it's not nice out, they move indoors. yeah yeah, not op, but it's possible. If you're growing food to sustain yourself for a whole year, I'm assuming you're willing to sacrifice some indoor space to accommodate.
Also, the GP doesn't read to me the way you're interpreting it. To me the GP has grown produce and purchased produce this year. The purchase hit him while the grown at home did not.
It would be... unusual... for an American home to contain enough space to grow the family's annual supply of lettuce.
> If you're growing food to sustain yourself for a whole year, I'm assuming you're willing to sacrifice some indoor space to accommodate.
It would be unheard of for it to contain enough space to produce the family's annual supply of food. And pointless. If you're growing that much food, there's no reason to build walls around it.
> It would be... unusual... for an American home to contain enough space to grow the family's annual supply of lettuce
I grow leafy greens in containers, and while not totally self sufficient, it provides a decent amount. I have multiple pots that I rotate through offsetting planting so new seedlings are going in as older plants are harvesting. If you're wanting head lettuce types then it's different, but if you just want leafy greens, you can totally do more than I think you're thinking you can.