Yes, absolutely. To throw some numbers out there, on a one-acre market garden, we should be able to produce enough food for 50 to 100 people. Economically we can generate over $100,000 of annual vegetable crops with 40% to 60% margins, depending on the skill of the grower, costs of inputs and things like that.
Yes, they are viable, and we make a good living and employ a small number of people just on our scale.