Could you get a cheap dedicated rear wheel to prevent having to remove the tyre?
I've had a red conti (sorry) trainer tyre on an old shimano rs10 wheel for years. The tyre must be about 13 years old now, it's starting to split a little on the edges, but keeps on rolling.
I've almost worn through my stash of old road tyres - what's the best "wheel on" turbo tyre that isn't a complete bastard to install/remove?