I kind of want to try this. How would it look at customs, practically speaking?
yeah I guess I'm more curious about how the border agents would react to someone showing up and saying they want to live here?
Since you asked about "customs" I answered about customs...
You don't have to tell a border agent (imingraiones) that you want to live in Argentia and I would not sugest doing that if you are entering as a tourist. You will either already have a visa in advance (if required) or be given a 90 day entry permit if you are from a visa free country.
Migraciones will not see your luggage, but obviously customs will.
If they ask why ytou are bringing so much stuff, you could answer that you are planing on staying for 180 days (with a prorroga) and this is what you think you wil need during your stay., especially if you say that you are renting an apartment that does not have a washing machine or dryer.
They might raise an eyebrow, but their prime concern is charging customs fees whenever they can as well as preventing prohibited items from being brought into the country. They won't bother you about the used items.
Though I seriously doubt it will be of any concern to customs, even if you are bringing several suitcases full of clothes, sheets, towels, etc., you could also say that you plan to apply for temporary residency, but they shouldn't be concerned about that.
PS: It will impress the hell out of anyone at migraciones or the aduana (customs) if you can pronounce the word "prorroga" correclty.
PS2: Based on what Dr. Rubliar posted in this thread, it looks like anyone (pregnant or not) can say (if asked by migraciones as they enter the country) that they "want to live in Argentina" and that is all they need to say to be granted entry.