For how you are planning to eat (lots of meals at Disney which is not inexpensive), your budget and advice from others I think is pretty good.
Food really is a big expense, isn't it. I usually get by in Orlando with a group of adults (next trip ages 26 thru 85) by budgeting $50 pp per day (includes groceries). Do note that we stay offsite in a condo with a full kitchen, we don't do any higher end sit down meals, we do all breakfasts in the condo, one dinner will be a big BBQ at my nephew who lives in Orlando's house and another will be a BBQ on the beach. We don't do any table service at Disney or other parks, just counter service type meals at the parks. On resort days or should I say non-park days, we never have more than one meal out. We have four park days and two non-park days on our seven night/six day trip. I have all adults and if they get alcoholic drinks pay for their own (I don't cover or budget for that). I budget for food for the entire group. At least half of my group (this includes me) drink tap water at meals instead of soda or coffee which save dollars. I also budget for what I think I will spend vs. the max I could possibly spend. Also for me and this is important to consider in case your budget needs to be the max you would possibly spend, it's not a big deal if I am over budget, as I have reserves - but I do like to and usually do hit my vacation budget pretty closely.
Arrival day we will get pizza and salad delivered to the condo or have a meal out at Ford's Garage (a casual moderately priced offsite restaurant that some in my party loved when we visiting Dearborn, MI - chain that they now have in Orlando) and our only evening activity will be a grocery store run/pool time. We have a car, so can make more trips to a grocery store as needed during the week vs. paying inflated resort supply prices at the condo convenience store. Our group snacks at the condo quite a bit.
We will be doing one full day at SeaWorld. Their meal deal for adults is $45 pp and we'll get that for our bigger eaters who want to do lunch and dinner at the park.
Next we have a resort day and a afternoon / evening BBQ at my nephews. Dinner in, lunch at Zimmie's a causal pool side lunch place at the timeshare where we are staying, and evening meal at my nephews, I will cover a grocery store run for him.
Or Epcot day - -umm - Flower and Garden is going on, so I really don't know what to expect. Not sure if we will graze at food counters or do some counter service. We aren't doing any higher end sit down meals there. This day could be a budget buster, as food at food booths might really add up for our younger 20 something / thirty something set (sounds super fun though). I've gotten by pretty economically at Epcot before with counter service when no festivals have been going on. This will be our first festival. Grandpa though will give all the 20/30 somethings some spending money for the food booths, though.
Busch Gardens to visit a relative in Tampa. We'll do the meal deal, which is under the $50 per day and do both lunch and dinner there.
Paddleboard /beach day -- sandwiches for lunch and BBQ on beach for dinner, so no meals out which saves some dollars.
A second day at Epcot for some of us (the ones going -- 60s thru 80s set eat pretty light) // Others will do MK and meals will be counter service at the Magic Kingdom.
Last trip I nailed it on my vacation food budget in Orlando. Note this is like my 30th trip to the Orlando area. Food prices have gone up since my last trip (2019), but I also on this trip am doing fewer meals out than last time by quite a bit, so I am guessing this will be a good budget for me again.