Thanks for all the great tips. I had a couple questions.

1 - Booking on KAL seems like a great option. Ideally I'd like to do business or first class going to Brazil and coach back since I only have 104 chase miles to transfer. My question is, can I do a free stopover somehow while booking on KAL using chase points? I was thinking a stopover in Miami or NY on my return home would be great.

2 - A tenative itinerary update looks like this:

Feb 7 Arrive in Sao Paoulo
Feb 12 Arrive in Salvador (for carnaval)
Feb 16 Arrive in Rio
Feb 20 Return home or use a stopover in Miami for the weekend.

From what I gather Coach/business/First one way is 30k/52.5k/70k, correct? So using all my miles I can do a one way in first for 70k and a return home for 30k in coach. I mainly want to arrive in Brazil fresh which is why i am choosing first or business. Going home coach is perfectly fine and a stopover in Miami or NYC would be sweet.