If you want to build a manor in the countryside, how big is it?

Generally, small and medium-sized ecological family farms have three scales: 80 mu, 40 mu and 10 mu. However, the scale of eco-family farms in different regions is also different. For example, the area of eco-family farms in Jiangxi is about 70- 150 mu, that in Ningbo, Zhejiang is generally more than 50 mu, that in Songjiang, Shanghai is about 100- 150 mu, and that in Wuhan, Hubei is about15 mu.