I would LOVE a mobile tyre fitters but I think you'd probably have to charge too much to make it worth it.

I take my wheels in loose MAINLY because it's about £30 extra just to have someone remove and refit the wheels and I'm a skinflint AND because I'm paranoid and would have to go around and recheck all the bolts so why pay someone £30 extra if I'm going to go around all the bolts anyway HOWEVER if that £30 extra were to have someone turn up to work and do it so it wasn't a pain in the neck with times and not being late for work I would definitley go for it