Here's something I hadn't considered - what do we do with the old fence?
Luckily one of Mom's friends did think of this. They live outside of town on a nice big plot, and they have a "burn pile" where they get rid of old wood and construction junk.
So we loaded up Dean's truck and schlepped it all out there. We apologized for all the rusty nails and stuff but the guy wasn't worried about it - apparently he drags a big magnet with his riding mower every few months for just such reasons.
He also loaned us a chop saw, which made cutting all the trim for the wall much quicker. We owe these folks big.