I had dry eyes for 4-6 months after my surgery, and even now, 11 months later, I do get bothered by it occasionally, although I almost never use drops anymore.
I asked my optometrist about the plugs early on when my eyes were very dry and she said that they were only necessary in persons whose eyes were extremely dry. Although I felt like my eyes were "extremely dry", according to her they weren't that bad.
I must say, the one thing I didn't expect from the surgery is how long it took for the dry eye problem to clear up. In fact, although I'm very happy with my result now, I may not have done the surgery had I somehow known that the dryness would stick around for so long. It was a real pain to be putting in drops so frequently, and I got worried after awhile that I was doomed to live with perpetual dry eye. However, it got better, but it took awhile.
As for the price, absolutely DO NOT base your decision on price. Base it solely on the quality of the doctor and the reputation of the clinic. Eye surgery is not something to be compromised in anyway.