I'm not sure if you should try spinning the plant in the manner you
suggest. If the plant is as large as you suggest and firmly rooted in
the ground (as most arbors are) digging up a plant of that size might
be an exausting process, not to mention the damage the grapes's roots
will take. If the plant is not in a damaging or obstructive (to other
plants, a view, or access to utilities) i'd reccomend leaving it in
place if you want it to survive. Moving a mature plant purely for
aesthetic value can be a disappointing and expensive process.