Where is the cheapest land for building a cob-house?

The cheapest land for building a cob house is often found in rural areas or less densely populated regions, particularly in states like New Mexico, Arizona, or parts of the Midwest, where land prices are generally lower. Additionally, regions with fewer zoning restrictions and a strong community of alternative builders, such as parts of Oregon or Tennessee, can also offer affordable options. It's essential to research local building codes and regulations, as these can impact the feasibility and costs associated with building a cob house.