Not to go off into the weeds of pipe organs but those long, large pipes need considerable air volume, pipe chamber real estate, and mechanical support, too. Those are expensive and why "resultant" and electronic pedal stops are used. The pic of the woman with the 64' pipe gives some perspective.
I think there are 2 playing instruments that have 64' stops in the USA - the Wannamaker in Philly and possibly the organ in Boardwalk Hall in Atlantic City (if they've gotten it restored to that point). The Atlantic City organ is a fairly high wind pressure instrument and some of stops have threaded pipe toes and wind chests to keep from launching the pipes into orbit.
Pipe organs can be fascinating instruments. If you have an opportunity to be in a pipe chamber while it's being played you're in for a new experience.
I think there are 2 playing instruments that have 64' stops in the USA - the Wannamaker in Philly and possibly the organ in Boardwalk Hall in Atlantic City (if they've gotten it restored to that point). The Atlantic City organ is a fairly high wind pressure instrument and some of stops have threaded pipe toes and wind chests to keep from launching the pipes into orbit.
Pipe organs can be fascinating instruments. If you have an opportunity to be in a pipe chamber while it's being played you're in for a new experience.