The issue, as you suggest, isn't so much that healthy food isn't available at a reasonable price but that turning it into meals may be challenging for someone working two jobs and lacking a proper kitchen. I don't think anyone can seriously dispute that. I just think it's mostly a mistake to lay the problem solely on prepared and fast food--which often isn't actually all that cheap.

As for travel, yeah. I started doing a lot more a number of years back and it took me a while to get more disciplined about it. I find it's more about regulating my intake than eating healthy per se. I try to avoid eating just because some food has been laid out for me. And I tend to keep things to one or two full meals a day.