Another thing - cats do need company. If you go away once every two weekends but are with them a lot, it doesn't matter too much. But if you leave at daybreak, come back at night, collapse into bed, and then leave on the weekend, the cats will not be very happy, and will not be very sociable either.

Do take two of them, possibly either two young ones or two older friends. The Mayhew has tons of them. They keep each other company, don't get bored, and in general live happier. Introducing a second cat in a one-cat household is going to make the first cat very grumpy - I know, I've been there.