I know what you mean; I like countryside, too---but in Europe, there's so much to see that's new (to me), and I hate losing the time to commute.
Ultimately, I think you decide what you want to see and how to do that and just let the cost be what it is. It's not like you're going to be making the trip again next month. I'm sure you'll have a good time however you do it--and it will definitely make you appreciate U.S. prices. I never fail to wonder how "these people can afford to be eating here." They don't make as much money in take-home dollars as we do, and yet they are, obviously, paying European prices, not for a week or two, but every day.