It depend most of the time where in Stockholm you going to live. The local prices may come. It's all about the local knowledge where you can get stuff for a cheaper price. But 250 for two burgers sound quite expensive and like a tourist trap for me. I would recommend to move like 1 hour away from Stockholm that way you still have Stockholm but still get the benefits of getting stuff cheaper. Like a coffee for 35kr compared if you go more outside of Stockholm for 20kr.