NUN,
With 18 points the end-goal is attainable for sure. Good luck!
Not everyone wants to hunt sheep and not everyone who hunts a sheep has designs on killing all 4 in NA. Sheep hunting is a great experience but so is deer hunting, elk hunting, bear, moose, antelope.... you get the picture.
I think accomplishing the goal of killing all 4 NA wild sheep is getting tougher by the year (without TONS of money). The people-population is greater and because of the information age, everyone knows about sheep and they all apply whereas, a couple decades ago, very few hunters applied for sheep tags compared to nowadays.
I'm glad I got started on sheep 30+ years ago. I don't think I'd dare dream about it today. Sorry new guys but the world population and computers have made it tougher.
Zeke