How many zombie crew would it take to move a 12-pound cannon that weighs 1,745kg (3,847lbs)? Or a 24-pounder @ 2,970kg (6,548lbs)?
Anyway, I'm on the less repairs/longer timers/no zombie crew side of the fence.
[edit] just for comparison sake a 1995 Honda Civic weighs in at 1,143kg (2520lbs)