Die with memories not wishes.
I am in my 50's.
When I was 18, Dall sheep hunts in Alaska were $4000, I didn't save my money and go. When I lived in Alaska in Barrow, Anchorage, Fairbanks and Sitka. I didn't draw a good tag so I didn't go, as even then I didn't want to deal with the unknown. I had several trips planned, and never went.
At this point in my life, I have lived all over the world. I have hunted a bit, and have had some amazing experiences. I have not hunted as much as most guys, 20 years in the miltary shook that up, getting married in my late 30's and having kids at home kind of destroyed the hunting budget. At this point in my life I could actually afford to go at $35,000-45,000 for dall in the NWT.
That would also do a lot for my finances to do something cheaper, more of a sure thing. I also live in Europe so the cost for me is greater. Also there is no sure thing that I will get it imported correctly and the German customs and agriculture folks will not destroy it. There are a lot of Asian and European goat hunts that could be had for the cost of one dall sheep hunt. You could shoot a slam of Spanish ibex, as long as they were all mid-range trophies for $30,000.
If the struggle was your deal, you could get on an airplane and hunt NZ on your own and chase tahr for the cost of air fare.
I honestly do not have any regrets on the Dall. There are other hunts I missed because of military deployments, marriages, child births, covid and so on. This is life.
I do not have a grand slam, and I can't see the value in it for me. I am not anywhere in the financial bracket where I think it is a good idea to blow over $250,000 (if you are lucky) on 4 heads of sheep. $250-300,000 invested wisley would allow for some amazing experiences every year.
My uncle climbs mountains, he has summited Grand Teton about 60 times. He has been on a lot of mountains all over the USA and Canada. He is in his 70's and still active. Even went to Everest base camp to help clean it up. He said he didn't get the value of the permit to climb the mountain he just wanted to go up there and check it out.
Only you and your finances know the answer to that question.