It only takes a few acres to have a market garden. Market gardens can expand a current agritourism operation by extending the months that visitors travel to your farm. ATTRA* has an excellent publication entitled, "Market Gardening:A Start Up Guide" that is available online by clicking here.
*ATTRA is a program developed and managed by the National Center for Appropriate Technology (NCAT).Funding for ATTRA is through a cooperative agreement with USDA's Rural Business-Cooperative Service. They information and technical assistance to farmers, ranchers, Extension agents, educators, and others involved in sustainable agriculture in the United States.