Dog Grooming Van Conversions

Hello! My wife is looking to add a mobile dog grooming van to her business, she already runs a salon, but we aren't having any luck finding a decent van that's already been converted. We were thinking of trying to do it ourselves, but it looks like a difficult process with all the different aspects of putting this together (plumbing, electrical, carpentry, etc.) and was wondering if there was anyone within the Houston area that specializes in van conversions. Any info would be greatly appreciated!