Actually, my 3qt HWB style bag was purchased online when I was 16, along with hose, and one nozzle
My 4qt bag was bought first with a full set of nozzles.
In both cases the clamps and fittings were purchased with the hose.
While the 4qt bag is used infrequently, it IS used often enough that, when you amortize the cost across all those enemas, it's insignificant
The Epsom Salt is purchased in the large bag or box. I think it was 4 pounds.
That will last may years. So will a 12 pack of Ivory Soap bars. Table salt costs only a few cents for a package that lasts years.
The only thing that costs much is the bisacodyl. In the Tablets I buy the house brand.
The suppository if I use it was also purchased generic several years ago and stored in the fridge.
When I can get the Fleet Bisacodyl mini-enema to use as a pre-enema and save the mucking around with those awful suppositories, that's the only ting that costs anything, and there is an alternative.
So far, for me, enemas have proven quite inexpensive.