Getting most of the way there isn't the problem for alot of guys, finishing it is another story all together.

Alot of hunts are in the $5-12K range, like some Elk, Musk Ox, Bears, Mtn Goat, free range bison.
Some animals are cheaper, Elk, All the Deer, Cougar, Black Bear, etc.

But then there are the big ticket animals, and usually the ones that prevent the slam. These are current 09 Pricing, if you start saving now, you can expect a very significant increase by the time you have the money together on most guys budgets.

Currently..
Stone Sheep run around $20-30K
Bighorn Sheep run around $15-25K
Dall Sheep run around $12-20K
Desert Bighorn aren't cheap either, $45K being the lowball figure and up from there
Polar Bear hunts will cost you atleast $25k when its said and done, probably more around $30k+...and to top it off, they aren't even importable back into the US anymore...So go kill one, but the bear you just paid $30,000 to kill must be left up there.

Granted if you start applying now, you have an extremely slim chance of drawing a bighorn, desert bighorn, or mtn goat tag in the lower 48, allowing you to do it yourself. This often takes 20+ years of applying for a tag, most guys do so in every state possible, and takes several thousand dollars up front, in some cases $2-3K that you won't get back each year when it is all said and done. Applying isn't cheap either in the big picture.


Just taking the animal counts, though on some of the hunts a mature male is required by law.

Im not sure, but I THINK the Ultimate Slam is more inclusive than just the 29 listed by P&Y (tule elk recently added), I think the Ultimate slam is more around 50 animals, including things like gators, javelina, and such....again not sure, but there is a slam including 50 NA animals and it is titled something like the Ultimate Slam. Most of these titles aren't official, it is just nicknames coined by the bigtime hunters out accomplishing these things, and then naming it something.