imo there's not many TS meals at WDW that I'd consider budget friendly, some are more justifiable if they're larger portions or truly great food but at MK and DHS, there's no meals that really stand out for dollar friendliness. We are not really big eaters, but to get more bang for our buck, we will share items or we'll skip TS all together. We'll also eat breakfast in our room like oatmeal and protein shakes and then we'll only eat lunch/dinner in the park.
MK-SH is a good choice especially at breakfast. We also really like the cheeseburger egg rolls in adventureland, The Friar's Nook sometimes has breakfast tachos that are pretty good or solid lunch options like bacon mac and cheese. Aloha Isle for some fun dole whips/desserts, the Westward Ho cart in Frontierland has good breakfast sandwiches and bacon on a stick, yum! Plaza restaurant is good solid diner food and nice sized portions and also good desserts from the parlor next door. Another good snack is the cinnamon roll or grey stuff cupcake at Gaston's, and I really like Lefou's brew. I also like the taco trio, chicken nachos or salad with grilled chicken at Pecos Bills. It's not the best meal but it's a more solid QS option than the burgers/gross nuggets in many of the restaurants. Not my favorite but a lot of fishy friends of mine like Columbia Harbour House.
DHS- Really like all the QS options there like Woody's, the lunchbox tart or tater tot bowls are good, ABC commissary has a delicious buffalo grilled cheese with a farro salad, the wraps at ronto roasters are really good, hollywood scoops is similar to sleepy hollow and has treats with waffles and those are tasty. TS- we do like sci fi dine in but it's hard to get ADRs. Food is pretty basic, unpretentious american fare but it's a fun atmosphere.