Used three-phase motors can be found for cheap money. That's probably your best bet. Look in the phone book for "motor repair" or some such. They'll probably have a pile of used motors sitting around they would love to get rid of.
I've got a VFD on my mill and nearly always leave the belt on one set of pulleys. It's really handy.
Try to make a living, not a killing. -- Utah Phillips
Don't believe everything you know. -- Bumper sticker
Everybody is ignorant, only on different subjects. -- Will Rogers
Law of Logical Argument - Anything is possible if you don't know what you are talking about.