Given the time constraints, I'd probably lean more towards the MA2 in your shoes as well. That said, I have the
M2P and it delivers excellent images and is remarkably capable, so if you can afford it, don't mind the extra weight, and want the better image quality from the larger sensor and Hasselblad raw files, then seriously consider going for the Pro.
Also, how old are your kids? I have a 5yo niece and she loves to fly my
M2P (closely supervised, of course!) and is getting quite good at setting up selfies and her composition skills are developing nicely. Besides the obvious applications for follow-me modes for things like cycling and other outdoor activities, it might be worth considering some usage in a "junior pilot program" as well, for which the MA2 might make a better choice. It'll give you an excuse for more flight time as well, of course.