Another suggestion is to cook a meal, maybe not every night, but a couple more times a week than you usually do. That way you have leftovers, and you take your lunch to work.
Long-term travel isn’t about being a college student; it’s about being a student of daily life. Long-term travel isn’t an act of rebellion against society; it’s an act of common sense within society. Long-term travel doesn’t require a massive “bundle of cash”; it requires only that we walk through the world in a more deliberate way.