If your honey is a real cat lover, he might try Zyrtec or similar for the allergies. it works great for some folks and doesn't really have side effects for most.
We've had barn cats for years. A few years ago, one decided to be a coop cat. He's an intact male who spends most of his time in the run. We have the netting from an old trampoline as a shade cover over part of the run and Pete feels that is his personal hammock . He wanders around the run and...