I've only seen it done at the American Coach Service Center. They have the equipment to remove the slide and with ore than one person working move or remove chairs etc same in the slide. They then remove the carpet and prepare the surface and adhesive padding etc and,in a pretty straight forward fashion do the job. I don't know exactly how long but less than a shift as they have it down having done it many.
If one of their coaches they can give you the price to the dollar once the carpet you want is known without any foreseeable problems showing up.