Much depends on how much use the TT will see. These ultra light TT get that way by giving up sturdy construction. They are flimsy. But if you will be using the TT a couple of weeks a year only on good roads then they may work until you outgrow the RV. On the other hand taking one of those down a rough backcountry road is contraindicated. Or on a 9000 mile cross country expedition.
The OP has fixated on the Durango before he ever posted this and was just looking for affirmation of his fabulous decision. He is not receptive to criticism and will not change his mind, period. This is common behavior.
