Fast = find an old PC with parallel port, a cable for it, download LinuxCNC ISO, burn, install, wire drives directly to that cable for parallel port = make chips
Cheap = see above
Easy = get a Mesa 7i96S and see above, minus the parallel port stuff
Good = se above this
Very good = see above this
Extremely good = get a Mesa 7i95T as you can later add encoder or glass scales to anything.
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For now, download the ISO on the downloads page and use it to boot any PC or laptop in Live mode, test the included sim configurations and the included GUI's as much as you like, it will not delete anything on the hard drive ... unless you explicitly ask it to.