On the apply page they say: "We'll reimburse up to $600 per group for travel expenses.", do you think is a tricky part? I mean, if we ask for a reimburse for the travel (which would be around $400-500), will we "loose points" during the interview because we aren't so much motivated as we even asked for a reimburse?
I certainly don't think they would hold it against you even if they knew. They're good people and don't expect you to do anything for free