Well...when I was working on the 1-18 I bought tools, parts, you name it as I needed them! A new spin seal, P'Blaster, a can of POR-15, two Frigidaire bellows pliers (inner and outer), an oil bellows, snap rings, a (used) Ingersoll-Rand 1/2" air impact wrench and Mac Tools deep impact socket set. Total cost was around $125-150 if I remember correctly. Could have been more though!
A Unimatic impeller tool and D-shaped oil bellows adapter came in as well that Glenn & I might end up using on his WO-65. Since the WO-65-2 has been restored to its original glory by Robert, and I don't use it that often (1-3 loads every few weeks or so), I don't think I'll ever have a problem with it, but at least I'm prepared with the necessary tools!
I still haven't found that elusive Frigidaire tub nut wrench though!