There are plenty of hulls that came with both options. I happen to have a 25 Anacapri that was an I/O and I’m converting. Same hull was sold as an outboard. It’s a pretty good sized project if you don’t run into any other surprises like rot or delamination but could certainly be completed in a month working on it full time and having everything ready to go. Most likely though the project will grow as you find things that need attention. If you love the boat, you’re prepared and can find some positive info on your hulls running attitude with outboards I’d go for it.