Knife. You maybe don’t need the ultra deluxe Japanese kitchen knives from the future. But a set of good, sharp knives will be a godsend if you plan to cook a lot.
Hiking gear. Especially the boots have to be of good quality. But breathable clothing (including socks) will also make a big difference when you go on a long trip.
Might be a no-brainer for some, but: meat. If you plan to make some steak, choosing a properly marbled piece of meat is as important as how you cook it. Will be exorbitantly more expensive than the discount meat, tho. But trust me, it will be worth it.
As a knife guy, choose the right knife. A lot of knives now are looking to sell on glitz and glamour whilst being fairly mediocre and criminally overpriced (see Dalstrong).
A lot of knives are overbuilt too. To give the impression of sturdyness, they are made far too thick, or have excessively large bolsters that just bog it down. You don't use a machete for daily prep, you want something thin that won't get wedged in the cut. Fun fact, in Japan a light knife is a sign of quality, it means it's very thin, which is difficult to forge and requires a master.
The best knives for ordinary people I think are Victorianox fibrox and Tojiro DP series knives. The Victorianox has decent steel but is importantly very thin and sharp, with a comfortable handle. The Tojiro is more expensive but has better steel that will remain sharp much longer. Of course it is also thin and sharp.