Your wife and your family is, or at least should be your main concern, period! When I first started out my wife was also "Skeptical", but she was supportive and she knew I couldn't reach my goals without her on board. So I did whatever I had to, to get her somewhat comfortable.
1. I urged her if she had any questions at all to ask.
2. I walked her through several potential deals before I bought my first one.
3. She gained comfort talking to other investors/mentors.
4. She watched a couple webinars here on biggerpockets.
5. Our first investment was a small, cheap house with minimal work needed.
All of these things helped her gain confidence in real estate and also helped us both to learn, and ask questions the other didn't think of. It's funny because now I come home and say, "I bought two houses today!". She's thrilled! One because she knows I'm living my dream, and two, because she gets to pick paint, carpets, area rugs, and whatever to make it a home for someone.
But never lose focus on the family, at the end of your REI game they will still be there. A house is just a house without a family. Best of Luck!
