There's more to it than just leveling. You've got to lay a base under the lane, in order to deal with the impacts 1st, which needs to be leveled. Then the synthetic goes onto, and once again, level it. The gutters, and pindeck materials. Sidewalls, pinsetter, ball return, Pins, oil, oil machine (unless you're into the old spray mop and broom method).
I believe with used pinsetter, lanebeds etc you were looking in the 50k range. With new you're in the 80-100k range.