Several of my metal working cnc retrofits are powered with 660in/oz servo motors. These machines are a typical 11 x 50" table, the size you'd use as a toolroom mill.
Depending on the amount of time you want to allow it to accelerate, it will go pretty fast, but typically the practical rate would be around 200 inches per minute on a .2" pitch ballscrew.
I still don't know what kind of real ACC/DEC curves you can set up with stepper drives, so I can't tell you what to expect there. But I think maybe you'll want to go bigger than what you were planning