Iso hash is easiest IMO all you need is isopropyl alcohol 90% or better, A container with a lid, and a glass/ceramic container to evap in maybe a fan if you are impatient. Not as good as sifted or bubble bags tho but "easiest" as far as equipment.
Easiest (after you build it) IMO is what I use, which is a tumbler. Put trim in, set it...and...forget it. You could dry sift in a frame or by using those grinders with pollen collectors which is the same concept but more work.
Next i would say would be metal turkey baster and Butane, probably most dangerous way but makes a good product more suitable to high quality trim or popcorn nugs.
IMO the hardest messiest way is bubble bags but bubble bags are good for large amount of trim, Especially when paired with a washing machine.
All methods have their place.
So if you want to make hash without buying or making specialty equipment.
1)go to the store buy $5 worth of ISO (2-3 bottles depending on how much trim you have).
2)Freeze trim
3)put in mason jar or tupperware with lid
4)pour in just enough ISO to barely cover trim.
5)Shake vigorously for 30seconds to 1 minute (shorter time = better quality but less quantity).
6)Strain out liquid into a shallow glass pan.
7)Put a fan on it (or not) and wait till the alcohol evaporates.
scrape up hash with razor blade.
Are there better ways, yes but that is the easiest, IMO.