I know that noodles can last for awhile and besides the sauce, i don't need much more than that. I really hope that my budget is WAY over what I need. I really like the idea of $10/day and I believe it's quite possible without much hassle.
Having ridden 65 miles/day for almost four months and done two other month + tours, I think you will find yourself needing a lot more than some noodles and sauce. $10/day is $3.33/meal. That doesn't include snacks. Have you looked at your current daily expenditure for consumables and factored in the increased calorie expenditure that comes with life on the road?
And expect to encounter higher prices than normal in some places. You may find youself having to shop at Ma & Pa Kettle's Mercantile. Places like that don't get the same wholesale prices as Wal Mart.
And personally, sampling the regional fare is one of the great parts of touring. Passing through western Montana and not having huckleberry pancakes or a huckleberry milkshake is like going to Venice and not seeing the Plaza San Marco. If I had the means, I would treat myself.