I like the sound of saving a world of trouble!
I wouldn't want to keep them in the tiny hospital pen that long, and frankly it's a pita to get it out of the garage into the yard for a few hours a day.
So, I'll have to see if I can come up with an outdoor quarantine pen. Maybe I can figure a way to add a small coop to it so I can leave it outside. Basically I'd need to build a two-bird tractor. I think I've got the building materials, I might be able to get something together that would hold them for a few weeks, esp. if I can move it around the yard.
If not, I think I'll have to pass on the chickens. It wouldn't be worth adding the potential for problems.
Mine just stayed in the garage for four weeks. I would open the garage door when I was home to give them natural light, and otherwise left a light on during the day. Although they would enjoy being given outside time, I think they can for sure get by without it! My quarantine area was a 4 ft x 5 ft dog pen in my garage, it housed 4 12-week old pullets comfortably enough. I think you are overthinking things again
