To continue the 'living vegetables' approach, one could point out that to keep a human in a coma alive and (somewhat) well will cost you somewhere from $500-$3k+. Per day.

Even assuming that animals are much cheaper by taking the bottom of the range and then cutting it by an entire order of magnitude, the 1.5-3 year aging of standard cattles being butchered means 50 * 1.5 * 365 = >$27.4k extra expenses.

That's some expensive meat.