If you had the climate for it a small African Palm Oil plantation would
produce 6000 liters of biodiesel fuel per acre---the easiest and highest
yield of biodiesel fuel I know, with some useful human or animal feed
byproducts to sweeten the pot.
In a less tropical climate, like around Corpus Christie, jojoba would
fit in, not much oil until shrubs are ten years old, but they live
and produce for 150 years. Seeds do not all ripen at the same time,
very expensive to harvest.