Is Barcelona expensive?
Barcelona is a destination aimed at any kind of budgets. There is a wide range of restaurants, bars, activities… It’s up to you to spend a lot of money or not. Try to find the cheapest places.
Accommodation is also very varied. You can find good accommodation in Barcelona and don’t get broke! For example, there are nice apartments on this site: Barcelona apartments.
Also, if you don’t want to spend a lot of money, you must try to avoid eating and shopping in touristic areas, as it is there where the most expensive places are. All over Barcelona there are restaurants with high quality dishes but also low prices.