In this day and age, when buying from a dealer or manufacturer for that matter, cash is no longer king. They make more money off of your borrowed money so coming in as a cash buyer isn't likely to wow them or push for a better deal as they will ultimately make less money off of you.
We are finally starting to see some decent discounts on last years models of some of the major brands that are
sold at dealers but I have yet to see anything other than the small standard incentives being offered on current model year trailers. For instance,
Oliver went from direct sales only to a dealer network last year and now I am seeing discounts as deep as $15K on their Elite II ($90-115K trailer) at a local dealer but only on left over '24 models in inventory.
In recent years
Casita hasn't had much in way of available inventory to sell on the lot, most trailers available are in some stage of the build phase and available only because the original buyers cancelled their order.