There are wonderful, interesting, affordable countries here in South America. Take her with you to one for six weeks in one part of the 12 months. Rent an Airbnb, continue working remotely. Then do the same thing in another country later in the year.Also in case of leaving the country to avoid tax residency I really don't know where I'd go. Going back to germany/europe would have implications on tax so ideally it would be some other country. But where would I go? And would there be additional things that need to be prepared in this case? In my mind it just overcomplicates things but maybe there's a super easy solution that I'm not seeing yet.
Or do one stint of 90 days (to avoid two re-entries and the doubling of the risk of re-entry denial).
The thing that is not clear in your story is the fact that you are still studying, until 2026. Can you complete your degree completely remotely? You're work is part-time, so perhaps your income isn't great. Argentina is terribly expensive now, but other countries in the region are wonderfully cheap.
I think the root problem is this: you are looking for a solution that gets you here full time (with no absences) and gives you the peace of mind of knowing that it is 100% cut and dried legal (and therefore safe) from an immigration and tax perspective. Unfortunately, in your particular circumstances, that solution probably doesn't exist at the moment, and you are going to drive yourself nuts if you keep trying to unearth something that isn't there. You are going to have to come to terms with living a little on the margin.
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