You're talking about three entry level coaches with small engines and the Allison 2500 transmission. The LaPalma and Vacationer started out as gas coaches and were elevated to DP's. Similar to the Fleetwood Bounder. It has traditionally been a gas coach and then they upgraded a few to DP's.
These are typically coaches priced at a level that allows gas shoppers to make that first step up into a DP. The Thor Palazzo would be another example.
Not every DP has a huge chassis. The majority are designed to tow 10K with some of the big boys being able to do 15K.
