As noted, it's all about the alloy cost. WW alloy is about percfect for handgun bullets. Sicne the ban in Kommifornia & now a few other statres about 18m ago, the rest of the country is finding out that ww mauf are switching nation wide to non lead. Since we used to get ww for free or very cheap, that supply is quickly becoming extinct. You can buy alloy, but if you pay much mor ethan $1.5/#, yo umight as well buy cast bullets.
The gear can be rpetty cheap; Lee 20# bottom pour pot, Lee 6cav mold w/ handles, tumble lube & you are into castin for just over $100. It doesn't take many bullets to make up $100 & the 6cav Lee molds, while not great, can be serviceable & produce 600 bullets an hour. Combined w/ tumble lubing, there isn;t all that much time involved to get a useful supply of bullets.
Now we can up the gear game; get a Star/Magam lube/sizer & more molds & you are in it for several hunders $$, but again, doesn't take that many bullets, if the lead is really cheap or free, to make that cost up.