AWS Outposts is the solution. I like Oxide but people seem to be blind to the actual competition when they focus on Dell as the competitor. AWS has been shipping Outposts racks for years. All prices are public on their website and you can order it today. Nearly every configuration is sub-$500k. Fully managed and AWS supports the entire stack; no buck-passing among vendors, same as Oxide.

Isn't that exactly what this Oxide rack is for?

Your not going to find any serious hardware product with reliability guarantees, in writing, for much less than half a million anyways.