You could commute, but you'd have to live pretty close by (MVD, EZE, LIM). Schedule at the moment is usually 8/4, rarely 10/4, and some 5/2. The 4 days off in a row per month are law, so you can expect that every month. During high season you can expect 8 days off total per month. Low season is a bit better with up to 12 days a month. Right now the best contract is offered by SKY Airline. They have MyIDTravel benefits, better pay than any other operator
provided you work 90hr/month, and 7 days off in a row per month guaranteed. In Latam change to the 787 happens at about 6-7 years, unless you luck out and are assigned directly to it, which is not very common. Time to left seat right now is approximately 10-11 years, compared to 3-4 years (provided you have no experience) in SKY and JetSmart.
hope it helps