Not trying to be rude but with your current points portfolio, you are quite a ways away from getting 2x award tickets to many cities and with your husband not wanting to get CC's for points, that makes it even harder. The good news is you are starting out well in advance and award seats for your dates won't open up until Sept/ Oct 2019 anyway. If you are considering AMEX already, debate looking into the Platinum card with 100k bonus. 1 card can get you a good start, 2 can get you very close.

First thing that comes to mind is a round the world ticket. Google: ANA RTW awards and read up on those - may be the easiest to pull off. Also, you don't have to use one airline/ program for the whole thing. I am flying from JFK-AUH-SIN (cash SIN-Bali) first Etihad in November on one award (American) then another home DPS-HKG-SFO Cathay business (Alaska).

You can also look into award services for assistance as well (there's a thread here to read up on).