The more I look into this the more I remember the research I did before we left. We're definitely not going to go with disc brakes. The issue is that we've now had 3 different Velocity rims fail in less than 10,000km. Velocity has been great and eager to support us by sending free replacements but I'm concerned that we're just going to wind up with another failure in 3 months if we don't change something.
Another solution would be to try a different rim manufacturer entirely but given our location and Velocity's willingness to help us it seems way too complicated/expensive to do that.