I am just curious... how much do you spend to feed yourself right now? Are you expecting to change your diet to fit a cheap budget while on tour? If so, how will you cope with that?
Further questions: How far and how fast are you intending to ride each day and with what weight? Have you given any thought to what your calorie needs will be for that riding? Is where you are riding going to have towns with stores along the way? How far apart?