Someone was asking how much garden to plant to feed three people. Let's do some calculations.
In my most productive year, I grew ½ gallons of dry beans on a 10 ft long trellis. A half gallon of dry beans weighs roughly 3.5 lbs.
You need roughly 60 lbs of dry beans per person to live off of for a year. From my garden efficacy numbers, that 60 lbs could be produced on 171.43 ft of trellis. For three people, that comes to 514.29 feet of trellis.