Even if you can technically claim that you're being supported by a family member?Officially/legally: at the very minimum a tax evader, violator of MULC regulations, and guilty in theory of a form of money laundering.
In practical terms, it depends. How big are you going to be living here? How much money do you plan on spending? This is why I always
encourage people considering doing this to speak with an Argentine accountant. There are tens of thousands of Argentines doing what you're
describing (minus WU, most use a digital cave) and they don't get caught, so it's doable, but it requires being comfortable with a certain level of
risk that only you can decide.
For new permanent residents, you're required to start paying taxes once you have lived for a 12-month period in Argentina, right?
Also, do you have a trusted Argentine accountant you can recommend? 🙏