Depends on what you shoot and how you load. Let's take a look at .45 ACP, for an example.
From
www.ammoman.com:
FIOCCHI 230 gr. FMJ - $119/500 rnds.
SELLIER & BELLOT 230 gr. FMJ - $119/500 rnds.
WOLF 230 gr. FMJ - $89.95/500rnds.
Those prices are with shipping, and assume you use a credit card. IF you use check or MO, there is a 3% discount.
From
www.ammunitionstore.com:
WOLF 230 gr. FMJ - $59.95/500 rnds.
SELLIER & BELLOT 230 gr. FMJ - $94.95/500 rnds.
ARMSCOR 230 gr. FMJ - $87.95/500 rnds.
Those prices are presumably without shipping, though I don't see anything one way or the other regarding that on their site.
Now, let us assume that you are going to buy your components in bulk...
1 lb. of powder should go for about $20 or less, but we'll be pessimistic and call it an even $20. You can usually load 1000 rounds of .45 ACP with 1 lb. of powder and still have enough left for a box or two, depending on the powder. Primers go for about the same, or $20/1000, again, being pessimistic. Brass will be your big expense, $56.02 at Midway right now, but it is usually a one time deal because with .45 ACP, the general consensus is to load it until you lose it. Bullets will be a big factor, but we're going for cheap and bulk, so we'll look at lead, plated, and FMJ, but no hollow points for right now. I can buy Winchester bulk 230 gr. FMJ bullets for $92/1000 after tax at the Tulsa Wannemacher gun show. Berry's plated 230 gr. bullets go for about $85/1000 at a gun shop in Tulsa after tax, Mid-Kansas lead 230 gr. bullets go for $50/1000, Sureshot lead 230 gr. bullets go for $32/1000.
Let's say you'll load 500 rounds at a time, so you're going to buy 500 peices of brass, but you're going to buy everything else to load by the 1,000.
Your first 500 rounds will be like this:
Brass - $60
Powder - $10
Primers - $10
Win FMJ - $46
============
Total $126
All other lots of 500 will be like this:
Brass - $0 (assuming you found all of it)
Powder - $10
Primers - $10
Win FMJ - $46
=============
Total $66
Plated bullets make it come out to $122.50 and $62.50 respectively. Mid-Kansas lead bullets will change it to $105 and $45 respectively, and SureShot lead bullets will make it come out to $96 and $36 respectively. If you already have the brass, you can skip the first lot of 500 costs and go straight to the second lot.
Some of the thinks you listed are one time costs (dies, press, scale, trimmers, lube pad). As the guys have said, you don't really save money, but you do get to shoot more for the same price.
Some things, though, you'd be hard pressed to load cheaper (.223 is a good example) than you can buy loaded in bulk, but these are usually loaded for a specific purpose rather than just flinging lead at paper or steel plates.