Counter-argument: we're talking about saving a handful of bucks for something that lasts months. Do it if you find it fun - I tried it and didn't like the work nor spice under my fingernails, at all.

My preferences in cooking are like software: high level is fun (cooking dishes), low level is annoying (growing or producing ingredients).

I also like making cocktails. A brief try with homemade coffee licqueurs was disappointing - knowing a couple of good brands, I can buy and enjoy them, no hassle. Closest to preparing ingredients I do is occasionally doing batches of "super juice", where you squeeze a bunch of limes and add some conservatives and enhancers (and water), that increase the yield, flavor and shelf life by a lot. Then it's really practical to just use the juice like a normal ingredient, versus having the cytrus available having to squeeze them and having more stuff to clean.