When people say it takes at least 5 acres to feed a family of 5, they must be talking about crops in single rows. Anyone with any sense does wide-bed gardening (3 or 4 ft wide), unless they're exceptionally fond of weeding.

An open tank in a plastic greenhouse can grow fish and food all winter. The tank is a solar collector that warms the greenhouse. A few chickens can add their body heat (approx 50 BTUs/chicken/hr), produce some eggs, and keep the bugs down.

Learn to can and dry food for the off-season.

Renting land is MUCH cheaper than buying land. Just keeping the weeds down usually costs the property owner money.

Find a way, find a place, and start learning.

Sue