[jojobas]

It's not really labour intensive, you have to offset very little labour and rent of your 10 sqm of land (not suitable for any more profitable crop).

Some subsidies can play a role too.

[Scoundreller]

Yeah, many “Christmas tree” species can grow in highly acidic soil that’s otherwise only good for blueberries, which are tasty, but usually not much else.

At the end of the Christmas season, you can still compost the tree or turn it into wood chips.