What does Jeremiah 35:7 mean?

He also told us, 'Don't build houses or plant crops or vineyards. Don't own any of that. Instead, live in tents your whole lives, so you'll live a long time in the land where you stay as outsiders.' Jeremiah 35:7 - Modern Text Bible

(Their ancestor's command was about living simply and as outsiders, not settling down or becoming like everyone else.)