domain SleepingBus.com

I just don't see it I'm sorry to say. The only way to make bussing a viable business is to pack people in as densely as possible. Even if there were a company that did this I think they'd likely go with a better name for cheap as there is no real competition for that type of brand. Plus it just doesn't sound right as a brand .. I'd be much more inclined to go with something like SleepBus or NightBus .. adding the -ing in most cases doesn't work for branding (with a lot of exceptions, but unfortunately I don't think this is one of them.

Good luck with it all the same!