Oh if only for an hour that will be fine, thought you meant for a day or 2. Well have fun and let us know how it goes. Be prepared to be running round trying to find him in the first few days lol, I was like this with my boys even though I had fostered before lol. He will no doubt get into anything and everything lol.
You always have them in pairs? I feel a bit unsure about just having a single cat, but at the same time can't really deal with twice the expense at the moment either.