When planning both time and money the best thing is to allow a lot more of each than you will need. Then enjoy the trip using as much of both as you need. It is so much nicer to not sweat a schedule or a budget.

We found 60 miles a day (including rest days) was about right for us on the TA. Your mileage will vary, but I think ours was pretty normal. If I were to second guess anything about out trip it would have been that I might have taken some time off to see a few places we were within range of.

We averaged something like $4-5 per day for lodging, but we saved by splitting the cost 3 ways in some cases. Probably a bit more than half the time we stayed free. We only paid for one room, but did wind up in expensive ($20-40) campgrounds a few times. We stayed in town parks, churches, and with hosts when we could. We had no desire to "stealth camp" though.

Food will vary widely in cost, but you will be hungry and food is one of the joys on tour so I don't advise eating nothing but instant oatmeal and ramen noodles the whole way. Spend enough to enjoy your meals whether that means $5 a day or $30 a day or whatever.

Remember that you will be hungry and thirsty and will need stuff like sunscreen. Sports drinks, snacks, bug dope, and sunscreen added up to a lot more than I would have guessed.

My preference would be to budget a total of at least $30 a day even though I might only spend half that. For mileage/time I'd do something similar.