If you don’t mind, I can offer you some dormitories to stay. For example, Mad Hostel and Cat Hostel are one of the most famous hostels that has dormitories. In addition, they also organize pub crawls. You can stay there for cheaper prices in the dormitories so you can save more money to visit many more places in Madrid, also you can meet people from different cultures in the hostel. But this would be a suggestion for a student or a backpacker, not for a family or a businessman of course! :)