Help find Tow Vehicle large family 9 with seating for 12 min

Watched a RV show on the travel channel a couple of years ago and a fireman from NY had a family of 9 that they homeschooled. They bought a diesel class B+ which had a towing capacity of 20k from what I remember. They had seat belts for everyone as it was set up like a short bus, which is where they planned on homeschooling. They then towed their large van with all their gear.