I'd maybe haul a ton of potatoes for a thousand pounds.

Sure as shit not tilling, fertilizing, planting, watering, maintaining, picking, hauling, and selling that many potatoes for that kind of money.

There's a reason big ag is so dominant, and it's (partially) because their margins are so insane a small farmer can't easily break into the market.

100m² isn't a shitton of land, it's 10m x 10m. Probably enough for subsistence