the only special tool you might need is one for the spring retainers. it looks like a screwdriver handle, but the other end has a sort of cup on the end, for pushing and rotating the spring retainers.
I also use vice grips to hold/pull springs. be careful - it's really easy to stab yourself with springs or other tools while trying to put stuff back together. taking apart is cake though.
i've done a ton of brake jobs (that happens when you're a mechanic for almost 7 years). i've only ever had to replace brake springs maybe 4 or 5 times in that whole 7 year span. it happens, but it's rare. it mostly happens when brakes have been long neglected and you can't get the drum off - the shoe has eaten into the drum, and it has a big lip, so when you pull the drum off, it tries to pull the shoes too, and breaks the retainer clips and/or springs, and bends other things. generally not fun.
you can't find a v6 camry/solara in a junkyard anywhere? i had no trouble finding one when i did the swap on my old 88. i think i paid like $100 cash for all the parts too. the pads were still good (though i sanded them a little to remove any glaze), and i turned the rotors to remove the layer of rust, and they were like new.