Not exactly the route I went but the down sizing was. I had a Motor Home that I was using as my home base. I had bought a 17 foot Casita single axle trailer to travel with. I'm single so room was not a problem. Used the money from the sale of the MH and bought a used 40 foot 5th wheel trailer and had it hauled to my lot, probably never to be moved again by me.
So that left me with a 17 foot Casita/ Tacoma pickup. As far as WDH is concerned, that is a question only you can answer. What I can tell you is the rig rides smoother with than without. I use an Andersen WDH which also has it's own built-in sway control.