Combine butter and potatoes in a large nonstick skillet over medium-high heat. Cook until potatoes are slightly browned on the edges, 5 to 7 minutes. Add eggs to the skillet with the potatoes and cook until set, 5 to 7 minutes more. Add Cheddar cheese, pepper jack cheese, and picante sauce. Mix with potatoes and eggs until thoroughly incorporated. Add crushed chips to the skillet and stir until well mixed. Divide egg mixture evenly among tortillas and roll up burrito-style.