I can see where this would make a nice router table. I question how appropriate it would be for plasma. The leadscrew design will limit your top speeds. You need speed (up to 300 IPM) for plasma cutting. Plasma dust is very abrasive and does nasty things to ballscrews. The screws are exposed. I see the reserve is almost 2000.00 I suspect it will go for more than that. You will then need to build a torch holder and a cutting bed. Don't forget the plasma unit itself.
Check the list for the free plasma table designs from Mlaws and maybe contact him about the best way to proceed. There was a recent thread about the actual target cost of a plasma system in the forum a few days ago.