When I did my TransAm in 70 days, it cost me $1134. But I stayed in a motel only one day out of those 70. If you are planning two motels a week, it will cost more ... a lot more. I spent an average of only $2 a day for a place to sleep. As you can imagine, I slept for free almost all of the time. The other $14 a day was for food, and at least two-thirds of my food came from grocery stores. There was virtually no alcohol in the budget. And I didn't buy any other goods or pay for any entertainment.
If you plan to spend 2 nights a week in a motel, then I agree with Patrick that your budget is probably too low. If you factor out transportation to the start and home from the finish, and you start with a bike in good condition and take sufficient spare parts with you, then almost all of your expenses will be food and places to sleep. Food costs depend on what you like to eat and where you like to eat it. Places to sleep can be found cheaply if you are zealous about seeking out cheap places to sleep. But if you cop out and get a lot of rooms or expensive campgrounds, it can skyrocket.
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