It all depends on the way you want to approach SASS. NCOWS shooters approach cowboy shooting quite differently.
As you know, SASS worships at the altar of speed. We call it a game and it is a game. Most of us simply need to ring steel. As fast as we can and as accurately as we can. Light loads and tricked out firearms allow us to this.
If you are OK with simply enjoying the camaraderie, dressing like a cowboy, shooting some steel, and remembering the Saturday matinee, go for it.
However, that person standing behind you with a timer goads the shooters to GO!!
You will find, if you are a competitor, that there is a lot more to it than simply buying leather and guns. For instance, SASS is the only discipline that I know that you reholster on the move normally and during a stage. Then the leather really comes to the forefront.
I agree with you statement of attending a match or five. Especially if you want to compete. And unfortunately, the pocketbook will determine how much you feed your competitive spirit. SASS ain't a cheap game.
May I ask what firearms were purchased.