I guess this this much more about cultural adaptation. Of course, when I referred to cheapness of food, I really mean the local food that you get just about everywhere on the street (which will usually be something with rice. That something could be a variation of hundreds or local side dishes so repetition shouldn't be a concern if you know how to order.) If you are looking for international cuisines then you will be paying high prices. Locals do not eat these daily and usually reserve them to Friday night outings or once a month kind of affair.