Put us down for BOTH! We enjoy months at a time in the RV and the boat. While they have similarities, they are very different. Both are wonderful "escape pods," allowing you to get away as time allows.
You are not the first to try to convince the significant other that boat time is a good time. However, if you have to "convince" her, it will be a long, uphill effort. Something she said was very telling... "something we could fish off of, waterski, and go for a short ride around the bay."
That one sentence lets you know that she doesn't understand what C-Dory boating is all about. Yes, it can definitely be a fishing machine. Waterskiing? Not so much. Short ride around the bay? She can't imagine being on a boat any longer than her bladder can comfortably accommodate.
Rather than convince, you need to introduce her to what the C-Dory lifestyle is all about. Road trip! Take her to a C-Brat gathering, and (for incentive) make it a romantic weekend getaway as well.
These boats can be an RV. You can spend as much or as little time aboard as you want. What we enjoy most about our C-Dory (25) is the fact that it can get us away from the world... easily. For a few hours or months at a time.
You need to let her know that there isn't anything "scary" about time on a boat... something not easy to do when you don't have experience, either. (See that suggestion about taking a US Power Squadron intro/safe boating class.) Suggest that she read through some of the posts here. Our cruising thread (The Cruising Adventures of Wild Blue and crew), under "Grand Adventures" starts out a year or so into our C-Dory travels, with a winter in the Florida Keys. Then to the Texas Gulf Coast, to Lake Powell, to San Francisco, to Yellowstone Lake, to the San Francisco Delta area, and then to the Pacific Northwest... from Puget Sound north into Canada. All that in one year.
If she enjoys that, I wrote a book about traveling with our cat... by boat AND RV, titled "Cat On A Leash." Check out our blog:
http://captnjim.blogspot.com/ if you want to see more.
We have had all kinds of wonderful adventures... by boat and RV. Our lives are better because of the travels - the places we have visited and the wonderful people we have met along the way. The C-Brats are a very welcoming bunch... expose your wife to the folks here, and she will be helping you find the right boat! 8)
Good luck with the discussions. Time is a-wasting... there are sunsets to toast... breath-taking vistas to photograph... local festivals to experience. Start right out your back door... how could you NOT want a boat there?
Best wishes,
Jim B.