We just went this past Oct, 2 adults, 1 teenager, 5 nights. Not really budget since we have done it for less but this could (maybe) give you an idea. Can't help on airfare since we flew from CO. We got 5 day hoppers from lmtclub (best prices by far) $845.91, and we also got the hotel from lmtclub (we usually book directly with the hotel but this was sort of last minute and my go-to places were booked) $583.20 (BW Stovall's). We rented a car from Dollar $126.02.
Food total was $726.85, which included -
ESPN, Carnation Cafe, Outback, Red Robin, Cafe Orleans, Rainforest Cafe, and Trader Sam's. We also went to cs - EoS, Ralph Brennan's, and Flo's. We did snacks - Dole Whip, ice cream at Gibson Girl, churros, donut, sodas. I got 3 travel mugs with drinks, poison apple cup with the ice cream (you know all those little extra souvenirs)
For souvenirs we spent $296.52, and that included 6 mugs at Trader Sam's. We got DD Mickey ears, I got a shirt, DH got a hat, plus a couple of little things.
That total is $2,578.50 - our flights were $528 so that brings it $3106.60 for 5 (not very budget) days.
This May we are going for 5 days again. We upgraded our passes on our Oct trip so we dont have to worry about tickets. The hotel I booked in June (yeah I plan way ahead, but the earlier the better the rate
) $643.60 @ Desert Inn and Suites. We will not have a car this time so DH and I will sign up for Uber before we leave - you get a $20 credit for your first ride so that will cover the transportation to/from airport. We are doing the MSEP dinner package at BB ($198) and the WoC dessert party ($237) - we are going for my birthday so we are doing special things we would not normally do. The only other TS we have booked (not really necessary but I like to have a basic plan) is River Belle Terrace. The rest of the meals will be cs which run around $40-45.
I do a lot of reward sites, from these I get Walmart cards, Starbucks, Southwest or Paypal - the WM cards can be used to buy Disney cards. Starbucks has milk, sodas, Mickey cookies. Our flights were paid with SW gift cards - just the other day our flights went down in price and now we have a credit
We also sign up for every email/reward program - we have Mimi's, Red Robin, Landry's (RFC), Outback, Jamba Juice. And I buy discounted gift cards - check out giftcardgranny which shows where to buy cards and who has the best deals.