Originally posted by Kfamr
Besides, it's NOT that we don't have enough room.... It's just that I don't think the cat could be inside 24/7 so it's day would be divided among the outside enclosure and inside, either in the guest bedroom while Simba is inside, or free-roam of the house while simba is outside.
If you attach the cat run to the guest room so the cat ALWAYS had inside space it would be the same as our catteries which are OK. You could place a cat flap in the window of the spare room INTO the run.

As cats needs to be able to go inside when they choose, not just when you are around. That is why an isolated run is bad, a run attached to the spare room would be much better solution.

Still suggest two cats as they will still be isolated to one room.