Fellers I ain't braggin' or tryin' to give ya no grief, but you can shoot as many rounds as you want to shoot.
In a good month my wife and I will shoot at least one BIG match (10 stages 400+ rounds) and 4-5 monthly matches (5-6 stages 240+ rounds.)
When we did do some practicing, we have shot 1500-2000 rounds per month, not counting shotshells (usually 25 or so per match.)
Now, my point.... you do what you want to do... if I want to shoot then I spend some of every week at the loading bench making ammo. I chose to shoot CAS, shoot some sporting clays and I know that if I want to play, I have to pay in some way, it is a fact of life, but a person plays to the level that he/she is willing to support.
Some Cowboy Action Shooters shoot once a month, some more and some every chance they get, the game is as expensive as you want to make it.