Frenchie, how to go about it? Elaborate. Sounds like a good plan.
I hope it's a good plan because that's what I intend to do within the next 12/18 months.
My situation is a bit special since I pay low rental fees (3000 pesos for a house+garden+pool) but that's even more valid for expats using short term rentals & paying 1000 USD.
The landlords of the house I live in wish to sell the house. They are not too satisfied with the estimate given by the real estate agent, and hope for a price of around 190.000 USD. The market is really slow, it's unlikely they'll get dollars, they want to sell the house but not for a too low price, the house could take 3 months to 2 years to sell (impossible to know), etc. On the other hand, if I'm making enough money to offer to pay monthly 3.000 USD during 6 years, maybe will they be interested (total of 216.000 USD= a bit more than what they wanted, getting paid in USD will be their "premium" for selling me the house on monthly installments + avoiding the risk of a sudden peso devaluation, etc.).
Same could be said for an expat paying in Capital 1.000 USD for an apartment worth 150.000/200.000 USD, and intending to stay here for +4 years. Maybe it can be worth it to try to buy an apartment in a potentially profitable place (Caballito, etc.) worth 150.000, paying installments of 3.000 on 5 years.
That's a bit the other side of the OP message. A "window" to buy real estate is in front of us. Some may have the cash to buy straight, some others not (my case).
There's also a risk that the real estate prices crash within 24 months, like in 2002, so the timing aspect is important too. For instance, Uruguayan friends of mine bought a PH in Cabrera x Bonplan in early 2002, right after the corralito. They paid (I'm not joking) 40.000 USD at the time (groung floor = about 80/90 sq. meters, a room on a half floor and an azotea/terrace above of 80/90 sq. meters as well). This PH is likely worth now 200.000 or so.
I might even try this technic to launch my project of black truffles cultivation (in Patagonia, in a micro-climate, using lands where trees have been burned down some years ago = makes the soil poorer, raises the pH -not the same PH as above- + Calcium in the soil = perfect for truffles).
I'm wondering though if any expat has done that (negotiating directly with owners). The sales contract will be the tricky part though (when to do the "escritura", guarantees not to get scammed and such).