I agree that 10k in 3/4 months might be a bit steap but this can be done in 2 phases.
husband gets 2 each aa cards right now with 6k spend and 100 k bonus miles.
Then in 3 months the wife applied for the two aa cards if they are still around with 50k bonus. if they are not arround then both wife and husabnd get one sapphire card each at 50k and transfer to UA/CO then get 5 one way with AA and 5 one way with UA/CO. i currently booked a trip for 3 like this in may it was easy to find outbound on AA and the return was easier to find on UA.