CR,
What you list is just the cheap tip of the iceberg - you haven't seen anything until you start shopping for "outfits" (cold weather and hot weather, working and dress-up, hats, boots, pants/skirts, leather), hearing and eye protection, and possibly a larger gun cart. But, as you say, "All this is cheap if she takes up CAS". Got to tell you it is great to have your wife develop an interest in something you like (expecially CAS) so you can enjoy it together.
Hamp