We don't set a budget, just use our credit card and pay it off after. We have a family of 5, me, DH, DS15, DD12, DD8. We can eat at for about $100-$125 a day and that includes 1 TS and 1 QS meal and an occasional snack. We eat breakfast in our condo and buy snacks and bottled water from Walmart. 3 of us are vegetarian/vegan and those items are usually cheaper on the menu than meat items. Also we almost always order water and very rarely order dessert (usually only if it comes with a kids meal). Not just to save money we just always drink water anyways and are not dessert people, would rather have a sweet treat in the afternoon maybe. We usually split meals as well. My DH and son might split a couple apps or an entree and app. I myself often order kids meals or I will share a regular meal with one of my girls. My girls often just share an app or order a coupe sides to share (vegetarian and don't like most kid offerings like mac and cheese, pizza ect). So breakfast in room plus drinks, snacks about $20, QS lunch or just snacks $20-30, TS dinner $60-75.
We also never eat at buffets or character meals but are doing HDDR this time, really want to see the show. Oh and we don't drink alcohol either so that is a money saver. In May we are planning to eat at Yak and Yeti, T-rex, Sanaa, Raglan Road, 50's, BOG lunch, HDDR and have reservations for Beaches and Cream and Sci-fi but may cancel those two as the timing isn't really working with my panning.