Huntinlabs....Just my opinion. If you are not going to do the rug or a pedestal for the Zebra, then the Black would be my choice. I was able to get a Blue on my first and a Black on my second trip. While I definitely like the Zebra, and had some of the same constraint the you have with the moving and the weight allowances (I am retired now), I think the combination of the Black and the Blue is a better choice right now. Maybe after this trip, you could start saving for the next trip and let your kids take the Zebra.
Once you get over there and see what there is, I am sure you will start planning your second trip before the first is over. It might take a few years of saving, but by then your kids would be old enough for the actual hunt. They will have memories that they will cherish for a lifetime.
On my second trip, a Nyala was on the top of my list...until my daughter saw one. Then it became the top of her list....the things we do for our kids! Either way, whenever the topic of the trip comes up, she has the biggest smile on her face as she tells the story. In my opinion, letting her shoot the Nyala was well worth it! Now I have an excuse to go over again.