Congrats on your success.

AFAIK, your best value will be to transfer to UAL miles. BUT, no transferring yet. You may want some flexibility later on and transfers can be done at any time.

First step, get some more bonus miles. For example, apply for Chase INK Bold with 50K bonus. Spouse should also apply for Sapphire Preferred and INK Bold cards RIGHT NOW.

Also think about the new UAL Explorer card with 50K bonus.

Once you have the 150K potential UAL miles available for both you and spouse consider options.