Okay... now that I know you have RFC gift certificate that makes a little more sense. So, does your $400 include your grocery bill? When I figure food budget for my trip it includes everything. So, your actual budget is $550 not $400 if you include RFC gc. I agree with Robin it can be done but it would be ordering minimal stuff. No sodas, desserts, appetizers, etc... My kids are always starving on vacation and they eat a lot more than they do at home with all our walking. In fact, on our next trip, I'm bringing the pedometer to find out how much we walk. Anyways... it can be done if you are prepared for no FUN food or drinks. And, since your kids really like sandwiches you can do that for several meals. When I order groceries I try to make sure it can be used over several different meals. For example, I got cream cheese (whipped) to be used on bagels for breakfast, on plain bagels with salami for sandwiches & to be used in eggs for egg scamble that can be eaten plain or on a bagel. This way I'm not buying a container of cream cheese to use once or twice. You'll have to report back on how your trip went...