With Cordoba you have to be carefull about arsenical waters.
Misiones is very undeveloped, I think you have to go in person.
At BA province there are major issues with houses because there was a drought and the land is very clayey. So, many houses sunk and / or got structural damage.
I gave up buying a house, I prefer to build it properly and it is cheaper, about 600 usd per mt2.
I have to say, subsidence because of drought never crossed my mind. Building brings its own set of problems, first off with the overload to water, electricity, and sewage networks caused by the post-pandemic exodus of people from CABA. You need to do some research to identify your site.
Once you have your site, it will probably be administered by a "fideicomiso", in part, I understand, because of the backlog in getting land purchases notarized. These fideicomisos are self-appointed, normally with an architect who feels entitled to interfere with your design and who's trying to get his/her sticky fingers into the different building projects in the development (this isn't legal, but whatever...). The fideicomiso also charges whatever monthly fees it feels like, and the numbers will likely never add up. Depending on the amenities offered by the development, the monthly fees could be from 50k up to 100+k Pesos.
Then you get to deal with the architects and builders. Architects are monumentally lazy, arrogant, unresponsive, and expensive. There are ways around them, but not everyone knows. Builders seem to quote for a project based on whatever fantasy number last passed through their minds, in the knowledge that they'll charge more as they blow through all the milestones and deadlines to end up with all the money spent (but, on what?), and the house still unfinished. Also, they'll underpay their workers, so they get inexperienced guys, and buy whatever materials are most convenient for them, plus fake invoices for you to justify the costs.
It can be done, but it's not straightforward.