Those kids won't stay small much longer, and IMHO you'll find yourself cramped in a TrailMini. I'd look for a 2619 or 2720 with a swing hitch. When it's raining outside and you've got 2 little ones bouncing off the walls, you'll appreciate the extra space.
It was bad enough for the 4 of us in our 2720 when our son was younger and we were all stuck inside in bad weather. My daughter would just curl up and read a book, but he was all action. I can't even imagine the 4 of us being in a TrailMini. We saw one at the rally in Petaluma and thought that the two of us might be able to fit inside there now that the kids don't come with us much any more, but any more people than that......
If you plan to bring along an extra tent to sleep in, it might work for you.
JMHO