The garage is cleaned up and swept out and dusted. The cats are using the beds at night and during the daytime as well after a good meal. And no they do not ever make a bathroom near where they sleep. That is not an issue with cats.
And there are now three sturdy and well-insulated cat condos out on the deck. I thought about placing these inside the garage but for the time being the bride and I have decided to keep them on the deck. The entrances face east, away from the prevailing and nasty northerly and westerly winds that can blow during cold weather.