If you don’t mind going the refurb route on the Delta Pro (2 + 3 = 5 year warranty) you can assemble even a better deal right now
Delta Pro (Ecoflow eBay Store refurb): 2x $1599 (have to make two separate orders to get around $500 coupon limit)
DVC: $115 (Ecoflow eBay Store)
Nema generator cable: $30 (Ecoflow Store and others)
So $3343 for refurbs vs $4500 new through Costco.
I’m a huge fan of Costco and no doubt would always pay a premium for Costco’s support and return policy.
it’s a personal decision on whether the savings would be worth it to go refurb or not.