i say 10K, is actually more like 12k.
Plan A: Southwest Premier/Plus/Business. 50k per card after $1k spendings. 110k in points to receive companion pass for the year, meaning if you fly, your SO flies for free. you can use your 110k points to redeem your points. you will get 100k for $2k spendings, then the remaining 10k to get to the 110k points.
Plan B: Chase UR is probably the easiest to earn points in. Travel cards are Reserve(100k after 4k), CSP(55k after 4k). other cards that earn UR pts are Freedom, Freedom Unlimited. Theres also 2 business cards, Ink+ and Ink Cash which both earns UR pts. Ink+ is probably the best way to earn points due to its 5x category in office supplies.
Honestly, if you fly with southwest a lot with your husband, that companion pass is very worth it. half off on all trips for a year basically. If your more lo key and want to also redemn for hotels and others, the UR earning is probably better. URs can also transfer to Southwest and you can probably book delta flights through korean air. points are more open to usage.
Im not familiar with SPG. sorry.
Venture one, i believe its you basically say $.01 per point, then buy whatever flight you like.