Nathan helps a hotel by offering a soundproof box so parents can have sex with the kid in the room. The owner is skeptical, but allows him to test it out. He builds a giant box that looks like a spaceship and brings in a family. He hires adult film actors to have sex while the child is in the box. The first test is a success. Then he brings in five more actors to have a gang bang while the kid is in the box. Another successful test. Nathan lets the owner keep the box even though he doesn't want it.
Nathan comes up with a system to never be late due to traffic by having a motorcycle pickup while someone gets out and drives the car to the destination. In theory, this seems like a good idea but in reality, nobody wants to hand over their car to a stranger.
Nathan helps a travel agency by offering funeral services to her aging clients. He does research on how much coffins and urns will cost and tests to see if a body would burn in a pizza oven because crematories are very expensive. The owner isn't comfortable offering the services.
The hotel idea is very funny but pretty far out there. Realistically I don't think anyone would use any of these services.