Congratulations on the SaddleSore to both you and your daughter. While the Ninja 250 may not be what comes to mind first as a LD ride, but there have been plenty of IBA rides, including several Iron Butt Rallies, completed on them over the years. You both get a big thumbs up from me (ok...a bigger one for her for riding 1,000+ miles on a 250 at age 16).
I've done a number of LD rides over the years, and I hope you will feel free to ask any specific questions on this forum or via private message.
You are more than welcome to participate on this forum, but I hope you will also consider becoming a member of the MSTA (if you aren't already). Our regional and national rallies are where you really make connections. I don't think we've had any rallies in Arizona, but we've had events in California and several in both New Mexico and Colorado. Our national rally will be in Vermont next year...that would be an epic ride from AZ.