You can buy fresh products at a reasonable cost in the USA, just have to make the effort to look.
Talking about processed bread, here is an example from Sam's Club [0] for sourdough boules, at $6 for four (about 1kg total). The ingredient list contains nothing ultra-processed.
What's a reasonable cost depends on your means. And I can get an (ultra processed) 800g sliced wholemeal loaf for less than 2 USD. There are other cheaper ones too.
Talking about processed bread, here is an example from Sam's Club [0] for sourdough boules, at $6 for four (about 1kg total). The ingredient list contains nothing ultra-processed.
[0]: Soudough boules at Sam's Club https://www.samsclub.com/p/members-mark-sourdough-boules-4-c...