It sure looks like a big unit, should be good for several thousand taps. I'm not sure about repairing the top, since a good vacuum will have a vac level in the mid to upper 20's, there is a huge force. I might suggest getting a new top. Then since the size is much bigger than you could need, get an estimate from others (I have no idea) on the value and sell it. Use the money to buy a smaller one and a vacuum pump to meet yore needs for the next few years as you grow. Good luck.
Do you have any idea how many taps the previous owner had on it? That may help.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.