For basic gear (in addition to the aiders, daisies, and jugs), get a fifi hook (it's cheap). Then for pieces in addition to your free rack: DMM offsets (brass and aluminum) will be used ALL THE TIME, get a cam-hook or two, and some tiny nuts (sometimes you can get a great deal on these from someone who tried and didn't like aid). After you start making some money, start filling in the rack with small and offset cams and ball nuts.
Who says I don't make money now. No, all joking aside, I'll have to think about this whole aid thing. It's fun and time consuming. It's great for bad weather.
I'll look into those offsets. I might be able to get them on .....