OK,..........................
The main thing (IMO) that has not been mentioned is the source of lead or alloy???
I certainly would give casting a go if I had a source of alloy.
Here in Florida there is no going to the tire stores to get wheel weights. Like batteries and most other things it is a Haz Mat material and must be picked up by a licensed recycle company.
If I need to buy lead or alloy, there is no advantage as far as cost savings to cast my own. For $40 +/- I can have 500, 230gr LRN 45 ACP delivered to my door.
Now if I had a Mt of lead in my back yard I would surely cast some bullets but living here in the sub tropics (literally) it's hot enough without sitting around a pot of molten lead.
There are only 2 or 3 ranges(outdoors) around here that lead can be used.I predict they will be closed in the near future. The 2 indoor ranges you can not even use handloads of any kind.
Let's use your premise. YOUR STATE is communist

!
No, just kidding, Roy. Don't take it wrong!
Anyway, I bought 450# of wheel weights for $30. At a 95% rate of recovery of usable alloy that gave me 427# for bullet material. (Which is feasible) That seems a bit much so, just for the sake of discussion, let's take it to 85%. 382# for $30.
Let's do the math: 7000 * 382 = 2674000gr OR 11626/230gr bullets OR 16712.5/160gr bullets OR 10696/250gr bullets.
@$40/500 for those 11626 bullets, you would have paid $930, I paid $30. Say you were shooting 44Spl and had a Keith style SWC that weighed in at 250gr, much sought after by the way, you would have paid more because they weigh more, maybe $45/500 or $962 that I would have paid $30 for.
Not to mention all of the free wheel weights I have gotten or free lead for that matter or even the 150# 5 gallon buckets for $20. I mean, it is pretty simple math.
My 45ACP bullets cost me 3% of what yours do. Can I shoot more or can you?
How fast can you pay off equipment if you save 97% on every box of bullets you buy? What is ROI? (Return On Investment)
Seriously, it is just simple math.
(Not to mention that I have what I want when I want in the shape I want and made of the alloy I want!

I think I said that already though! )