5 Boxing on ONE machine with software broadcasting?

You can build a quality, playable 5 boxing rig these days for roughly $1000 - $1200. If you want all the bells and whistles, looking at about $2000 - $2200.

Less of course if you have a moderately up to date machine and can update the ram, video card and add a quad core to it.

If you want to go all out and build 5 custom machines, which is what I did (later expanded to 10) because there WAS no software option - you are looking at about well, $5k for 5 boxing. Maybe a bit (700 - 1k) less if you skimp a bit. Give or take. Read my how to 5 or 10 box sticky. I literally go through EACH expense and keep a running tally.

Leveling up depends on you. Figure about 2 - 4 days to set it all up and tweak it and get it functional enough. I would then expect about 10 - 15 days played to hit 70, assuming you know the 1-70 run and don't waste time. Maybe less now that 20 - 70 has been sped up. Shamans would likely be easier to level up because all of them can ankh and rez. Warlocks go the same way - soulstone on the rezzer. Mages are a bit slower as there is less room for error and when the priest dies, in an instance at least, you are toast.