My interviews tend to focus on the people who live in tiny homes and less on how people design their tiny homes. But I've had several people tell me that they'd like to learn more about the process of converting a vehicle into a tiny home.
Great idea for a shower on the van. Black PVC pipe with hose attachment. Could also use it as a mobile washing machine for clothes. Just chuck clothes in the end and fill with water and detergent while you drive around. Rule When staying at the beach