When you get the machine, be prepared for 2 things:
1) It's HEAVY! The head on my Juki weighs close to 70lbs. I swear it's made out of cast iron or something! Add a table and motor, and - well, you see where this is going. Take along a buddy to help you load and unload. You won't
do it yourself.
2) It's most likely set up to run very fast. Most industrial machines are set up to be used for hours on end, and time is money. I posted instructions on how I slowed my machine down for less than $20 here:
How to Slow Down Your Sewing Machine
It involves swapping out the motor pulley and belt on a clutch motor, and it does work like a charm.
Good luck, and practice, practice, practice.