Most teams train at least once a month, and also play in one tourny a month as well.
Again most teams will split the paint bill, at the end of the tourny, by the number of team players. e.g. 7 and you also pay a fee for playing in the tourny, again divided by number of players.
On a training day, up to the team, either buy your own paint through the team or divide up the total cost at the end of the day.
Some teams also have a team subscription each month to help with the running costs and put some cash to one side to play special one off events.
You will need a decent mask, but apart from that time and money are what determins how much you play.
Where abouts are you???
You will find that almost every team is looking for new players, and as long as you are commited, you will be welcomed with open arms.