Your theory seems like a good one. Agree supporting more than 1 or two animals would need supplemental feed and some grain or Alfalfa (or other) pellets are options although adds significant cost. With little space, parasites, worms, etc will need to be addressed regularly probably with medicine, and then there are predators (coyotes), a barn for lambing and shelter, and if you do hold ewes over more than one year it is common to shear the wool annually. All things to learn so buying a couple of weened lambs to see how it goes with that space would be a good start.