Prices vary depending on the region of the nation, the size of the field, the amount of tempered glass used, and so on. A standard 84' by 185' field would cost between $120,000 and $180,000. Larger or smaller fields can be built for less or more money. Indoor soccer fields must meet federal safety standards and are required to have goals, nets, markings, and lights. The surface should be synthetic turf or hardwood. Outdoor fields can also be made with sand or grass. There are two main types of indoor soccer facilities: ballrooms and modular buildings. A ballroom is a large room with a low ceiling that can hold several basketball courts. This type of facility is common in Europe and some countries in South America. Modular buildings are constructed in a factory and then brought to the site where they are assembled. These fields are popular in North America because they are less expensive than permanent ballrooms. They can be taken down after each use and moved if needed. The quality of life in areas where indoor sports are popular tends to be higher than in cities where outdoor sports are played due to lack of pollution, crime, traffic, and other external factors. Indoor sports do not require special equipment except for balls and nets which can be bought online or at any sporting goods store. There is no special training required to play indoor soccer.