Not true- there are plenty of poor farmers. They might have plenty of land- but no income but the farmer's dole.In Dublin there’s the expression « there’s no such thing as a poor farmer »
I know many old bachelors who have virtually nothing and live in poverty, surrounded by their land.
It is the relations who sell the land after the "uncle" died who will be rich.
Surely there is a large group of rich farmers as well who are well off- no doubt.