Totally nonsensical. Even from a basic energetic calculation it does not make sense. Assume:
- Photosynthetic efficiency (sunlight to starch) 0.5% for typical crop plants [1]
- Average daily sunlight of 5kWh/m2 [2] or 18MJ/m2.
- Daily requirement is 8700 kJ for adults.
With 200 sqft you will only get ~1700 kJ. Even if you a had a cow stomach that could digest the entire biomass of the plant (2~3%) you would barely make it.
And then there's the issue of where you will get any nutrient other than carbohydrates.