How much money do I need for 3 weeks in Thailand? How much money do I need for a week in Thailand? We recommend budgeting $840 per week for a mid-range vacation in Thailand. For that price, you'll eat at upscale restaurants, go on tours (possibly daily), and visit popular clubs and bars in the evenings. What can 1 US dollar buy in Thailand? Four liters of drinking water (1 gallon) or...