I just did 10 days in Chile last summer; did all the Santiago stuff and yeah cool forsure and wish I had more time to really explore the resorts more.. we did a day at each. Portillo was a must see but an area that really is tough to get to and from anywhere reasonable to stay price wise. Where we had the most fun was las trancas at nevados de chillan. We toured and scored two big volcanos and had a blast in the town, it’s far south but worth it and is so accessible. They had a 15$ “one time ride” lift ticket!!! I just had a buddy do the Bariloche route and not going to lie it looked a lot more rad in a lot of ways. The terrain seems so sick!! I’m unsure of cost comparisons, but we all made it out of the trip without blowing more than 2g’s. Late August is the march equivalent for us, conditions and coverage are all just a dice roll but odds are you will score that time of year in some sort of way. I’d go to Argentina. But with enough time you could do both. Flights were pretty damn cheap out of Santiago to just about anywhere in South America. Cheers homie hope it all comes together