could you tell more ?

The most basic version is to combine a sandbox or incubator with a productive rural property. I think breaking up one's building sessions with a session of physical work in a garden or similar would really help prevent burnout and would keep the costs of starting up super low. I grew up in a rural area and several of my friends and I have been discussing how those sorts of large properties could be used productively, and that is a solution we think is worth trying.