I have a feeling they will go on a magic key blackout date anyways. They have options to make this happen. They might prevail upon Oma or Charlie for more funding, or maybe they'll pawned the expensive Minnie ears (if they hadn't already for Nobu), or maybe it'll be another buddy vlog with Spencer and Public Figure Jeremy. Maybe KT - since she is not divo-d yet - draws from a joint account she still has with her husband for such an emergency occasion like blackout dates.
Course they'll probably just grift more from their stans like they always do. I do not see them skipping out on the holiday season, unfortunately.