Ilford has been cheaper than TriX at B&H for the last couple years. It also dries flatter than TriX which makes it easier to scan. Don't really find the cost of a roll of film to be much of a factor since equipment costs (especially for equipment fanatics like those here) are so much more.
Digital cameras and computers depreciate and film cameras cost to load. You pays your money and makes your choices or find another hobby.