A plan, since now, of a 20 square meter hut with just a roof made of a sheet of tarpaulin. It has 5 corners. The tarpaulin is formed to collect rainwater at the lower eaves end. It's a wooden construction.
A "sweat box" style germination chamber built using readily available parts and a broken chest freezer. Early season germination can be inconsistent without a closely controlled environment for starting seeds. Commercial greenhouses use similar systems but the cost can be prohibitive for the small vegetable grower.