The jury is kind of split on Hunters. There are some who own and sail them and are very happy with them. Some not so. I think that the consensus is that they are not the best built boat out there, but suitable for light-duty use i.e.: you don't want to get caught in heavy weather in one.
Personally, I would think that a boat of that size, for that price will have problems that need to be rectified before you leave the dock for anything more than an afernoon's sail. Not because it is a Hunter, but because it is a 30 foot boat for $12,000.00.
If you think the boat is in great shape, then go ahead and get a survey done. If you have doubts, my recommendation would be to look at smaller boats in better shape. They are still quite capable of doing what you want.