Our family of 4 just returned from 10 night stay at the Aqua Waikiki Wave. We chose to have the breakfast vouchers at the hotel and then have a late lunch which kept us going all day and would just need snacks in the evening. Our budget was $100 per day and we were well under it. You could easily get a meal at either Maccas, Hungry Jacks, Jack in the box, etc a meal for all of us was about $7 each. We also ate $8.95 for lunch or $11.95 dinner all you can eat at Smorgys. We also treated ouselves to The Cheesecake factory a few times and a few other cheaper restaurants. If you buy take away you dont have to leave tips and if you buy bread, margarine,cheese,ham and make sandwiches in your room or milk and cereal you can save money like we did. We also took The bus everywhere because it was cheaper, the trolley was $2 per person and the bus was $2 for adults my 14yr old was $1 and my 4yr old free. We didnt enjoy KFC it tasted different there.
The pizza hut/Taco Bill at the Ala Moana center was excellent value for money and we went there several times to eat.
We shopped at the Food Pantry and Abc stores (look out for the managers specials).