So if you're not even planning on keeping a bike as long as a cheap, standard, single-speed chain has lasted on my bike, then why do you want to go with a more expensive, less available, and far less proven belt design? Based on the bike and your own statements it's not for the weight saving. Now you indicate you're not really interested in long life. And you want to enclose it so you'd be nullifying the cleanliness advantage. What benefit is left that you think you'd be getting from using a belt?