We plan on moving to CR before year end. Since it will still be wintery conditions where we plan to come back to visit in the U.S., our plan is to make a border run after the first 90 days , then make a U.S. visit after the next 90 days. At that point, we will decide if we want to pursue residency and can start paperwork on our visit back.
My question(s): Can we fly in on RT tickets - how do we prove to immigration/customs that we will exit at 90 days? Do we make arrangements prior to show proof (how to do this?). The Rt return date would be 6 months out.