not really commenting on the OPs question just my 2 cents on the cost/benfit angle
IMO First off husbandry and vet bills are slightly different expenses and need to be evaluated differantly. There has to be a Practicallity factor involved in ownership expecitally if your a breeder not a "pet" owner. I live on a farm and often the tough choices are made on the dollar value, even a 25 dollar vet trip is not concidered when a chicken/barn cat gets injured, the animal is swiftly disbatched . I know that to some this may be distasteful, just the way it is. There are times when the "freezer" is the only real option, thats just my 2 cents.