As others have said...
CHASE SAPPHIRE RESERVE or
to a slightly lesser extent CHASE SAPPHIRE PREFERRED
If you own a small business, LLC, etc apply for CHASE BUSINESS PREFERRED INK
---note that I read that you may not even need to own a bonafide business. esp. if you do freelance work or sell stuff on the side. you can use your SSN over your Tax ID when they ask for it.
Timeshare purchases are coded as Travel so that's 3pts per dollar spent on Chase.
Cash Back Examples, assuming $20k Timeshare Purchase - Assuming NEW application
CS Reserve (CSR):
50,000 Bonus Points after $4k Spend in 120 Days
$20,000 Purchase = 60,000 Points
$550 Annual Fee (Offset by $300 Annual Travel Credit + many other benefits that are worth it in my opinion)
Point Redemption Options (not incl. travel-related redemption):
1. Straight Cash Back, points are worth $0.01/point
2. Pay Yourself Back, points are worth $0.015/point
(Pay Yourself Back is similar to a Statement Credit. When you make eligible purchases on the card, you can get a statement credit for each transaction using points.)
Expected Savings:
110,000 x 0.015 = $1650 - $250 Annual Fee (after Travel Credit) = $1400 Cash Back
CS Preferred (CSP):
60,000 Bonus Points after $4k Spend in 120 Days
$20,000 Purchase = 60,000 Points
$95 Annual Fee
Point Redemption Options (not incl. travel-related redemption):
1. Straight Cash Back, points are worth $0.01/point
2. Pay Yourself Back, points are worth $0.0125/point
(Pay Yourself Back is similar to a Statement Credit. When you make eligible purchases on the card, you can get a statement credit for each transaction using points.)
Expected Savings:
120,000 x 0.0125 = $1500 - $95 = $1405 Cash Back
Chase Ink Business Preferred (CIBP):
100,000 Bonus Points after $15k Spend in 120 Days
$20,000 Purchase = 60,000 Points
$95 Annual Fee
Point Redemption Options (not incl. travel-related redemption):
1. Straight Cash Back, points are worth $0.01/point
2. Pay Yourself Back, points are worth $0.0125/point
(Pay Yourself Back is similar to a Statement Credit. When you make eligible purchases on the card, you can get a statement credit for each transaction using points.)
Expected Savings:
160,000 x 0.0125 = $2000 - $95 = $1905 Cash Back
NOTE: IF YOU ALREADY HAVE CHASE SAPPHIRE RESERVE or PLAN TO OPEN BOTH, you should be able to transfer your points from either CSP or CIBP to your CSR, which has the .015 redemption value.
Expected Savings combining CSR AND CIBP:
100,000 CIBP Bonus
45,000 CIBP Spend Points ($15k Spend x 3)
50,000 CSR Bonus
15,000 CSR Spend Points ($5k Spend x 3)
210,000 Total Points, all xferred to CSR x 0.015 = $3150 - $345 Annual Fee Total = $2805
Sorry, I thought about this WAY too much. I LOVE Maximizing Credit Card Bonuses
EDIT: Take note that Chase employs a 5/24 Rule. If you opened 5 Credit Card Accounts on Chase over the last 24 months, they will likely deny you.