EDITED post, I do not currently carry bodyweight in each hand for farmer's walks, although that is a reasonable goal. Currently up to 120lbs per hand, not counting the handles.
FYI, I use these handles, which are really great and don't take up a lot of room: https://www.amazon.ca/Synergee-Compact-Farmer-Walk-Handles/dp/B07VTQBQXJ
Yo, Canadians.