I would not risk “visa runs” unless you absolutely need a current visa (my registro civil stated that my passport needed to be up to date to get married, but this was provincia, 6 years ago, and different administration so your mileage may vary.)
It's not like you're fooling anyone of not being a permanent tourist if they decide to look at your passport.
Am just about to go the legit route and get residency. My reluctance has been the need to have money sent to a bank account here in dollars.
Only once in my 7 years here doing visa runs (although I go to USA annually) did migrations threaten me with all the visa stamps going from Tigre to Carmela. I told him as a retiree, I have no set plans and a lot of friends here in Argentina. I said if you want to deny me entry, I'd return to my house in Ft Lauderdale and lay on the beach all day; he stamped my passport. Never had a problem though I know I could; the alternative for me is....not so terrible.