You should be fine. I for my part spent about 9 months here (now in my 10th and last month), exiting the country within 90-day terms to avoid overstaying what the passport stamp says (turista 90 dias). The law says a little more than the passport stamp (not to stay more than 180days/year or something alike), never ran into any problems though. There are mixed opinions on whether it is better to leave and return every <90 days, or "overstay" and pay a fine on exiting. I understand that you, having a family, have an extra desire for security.
There is a visa category "academic"
You would need some expert help to do that stuff though, find out if and how you can get visa for the rest of your family on base of that law, etc.
I don't think there is any way around that if you want a visa.
Nevertheless, from what I understood, you are a professor and will work in a university. You should get to know a lot of people that way. Which can help a lot in this country. With some luck you get to know somebody who knows somebody who can resolve your visa issues within the 180 days (2x90) that a tourist can legally stay. Just to have some extra security. Keep in mind that for taxation reasons a DNI is not entirely benificial, it also bears new responsibilities which tourists don't have.
There is a visa category "academic"
From http://www.migraciones.gov.ar/pdf_varios/residencias/ley_25871.pdfi) Académicos: para quienes ingresen al país en virtud de acuerdos académicos celebrados entre
instituciones de educación superior en áreas especializadas, bajo la responsabilidad del centro
superior contratante. Su vigencia será por el término de hasta un (1) año, prorrogable por idéntico
período cada uno, con autorización de entradas y salidas múltiples;
You would need some expert help to do that stuff though, find out if and how you can get visa for the rest of your family on base of that law, etc.
I don't think there is any way around that if you want a visa.
Nevertheless, from what I understood, you are a professor and will work in a university. You should get to know a lot of people that way. Which can help a lot in this country. With some luck you get to know somebody who knows somebody who can resolve your visa issues within the 180 days (2x90) that a tourist can legally stay. Just to have some extra security. Keep in mind that for taxation reasons a DNI is not entirely benificial, it also bears new responsibilities which tourists don't have.