There is growing regenerative agriculture movement that focuses on small farms. Especially works of Richard Perkins - his slogan is even "Making small farms work". He (used to) make living from 10ha's of land in northern Europe. Key was to have multiple small enterprises in the same farm that support each other, and which don't require big investments. Also selling goods straight to customers is important so there's no middlemen eating your profits.

https://www.richardperkins.co/about/