Well, the post stated " BEST " not the " CHEAPEST "..
HMMM..., Now lets consider:
1. Firearm(s) cost
2. Traveling expenses : Food / Gas / Accommodations
3. Hunting License Cost & Tags : Out of State Hunter ? $$$$
4. Field Equipment : Tents / Packs / Boots / Parka or Jacket , etc.
5. Guide ... ?
6. Taxidermist Cost : Hide or Mounts ?
7. Premium Loaded Ammo : Store bought or Handloads ?
The Premium Ammo " bullets/Loaded Cartridges ",.. might be the least expensive item on the list
I also considered what bullet(s) could be used in " All of North America ",
which excluded " Lead Bullets " .. at least in portions of
" CA Lead Free Areas " !
PAPI