As far as I know, there are two major ones in the US.
The Paintball world has many clubs and associations. The main one being PSP for speedball and the SPPL for scenario. There are also college leagues as well as entire communities dedicated to Paintball such as techpb.com
Anywhere from a few to hundreds of thousands of dollars.
At most places, and all professional leagues, yes.
Due to the multiple amounts of league, it is impossible to determine the exact number of "pro players". You must take into consideration the number of leagues, divisions, and rankings.
The exact number of paintball teams in Canada can vary over time, as new teams form and others disband. However, there are numerous local, regional, and national teams across the country, often participating in various leagues and tournaments. For a more precise count, it's best to refer to paintball associations or league websites that track team registrations.
Most leagues start after the summer season, World Cup is typically held in Florida in October as an example
Currently there is no international league that country teams face off in. There are only country, and region wide tournaments and leagues.
Check your town hall or go to your city website for rules or restrictions
The United States is widely considered the country where paintball is most popular, with a large number of players, numerous paintball fields, and professional leagues. The sport has deep roots in American culture, especially since the 1980s, when it gained significant traction. Other countries, such as the United Kingdom, Canada, and Australia, also have active paintball communities, but the scale and visibility in the U.S. are unmatched.
No it is not, we have many paintball fields in the area.
Two leagues: National and American
1 foot = 0.000063 leagues.