It seems National RV had a history of building DP motorhomes for a couple of years then dropping the name. They had Tropicals, Marlin's, Carribean's and one called a Bus in addition to the Tradewind and Islander which they built for years. The short term builds were good motorhomes. Some Tropical's were on Freightliner chassis and I saw one on a Spartan. Pay attention during your research to chassis maker as some had IFS and others had the solid axel which could be a price point. The Tropical is a very nice motorhome. I saw some on RV Trader yesterday.