I don't like to cook. On the other hand, I've never been to Don Julio. I've been eating in more, but I still go out a lot. I never liked paying "too much" for a meal in the US, and I don't like to do that here, either.
We could advise you better if we knew how you want to live here. I've read all your posts, and I still don't know, except that you seem extremely conservative.
Based on that alone, I think that if you buy your house (apartment) here, I think you'll weather any storm with 4000/month, and probably even with 3000/month. If you're adaptable, and don't mind doing your own cooking and conserving your money during times like this, I think you'll do very well here with 3000/month.
Yes prices have risen sharply, and my continue to climb in the short term, but there's a definite limit. I've been here 20 years, and I've seen lots of reasonably extreme ups and downs (I paid about $3/month for electricity in 2015 during Cristina's government, and as much as $60/month during the Macri years, then back to about $4/month during Alberto). The majority of people here are poor. You can't charge $1 for a bus ticket if a person is only making $3/day.
Buenos Aires is a great place to live, and I've always said, and still say, that it will be a better place to live if the Argentinos live better, even if I live a little worse.
I couldn't live on $1500/month (not even close) in Massachusetts (where I'm from). I live very well on that here.
My observation is that the biggest things to worry about long term are housing and health care. You can solve the first one by buying the place you're going to live in. The other one is trickier, and reading the thread about health care prices, it's a bit scary right now, but ultimately, it's the same issue as the bus ticket.
I think the best thing you can do to mitigate the risks is to have a nest egg, and try to live in a way that let's you add to the nest egg every month. I live well below my means, and it let's me sleep easily during times like these. I'm saving less from by below-$1500-per-month social security payments than before,
but I'm still saving. In Massachusetts, you can't rent an apartment for less than $1500.
Maybe there are better deals,
financially, in other places these days. I suppose it's probable (perhaps temporary, perhaps not). But I'm reading the recommendations of others here and I'm seeing, "smaller cities, towns in Italy in decline, living outside Buenos Aires," and I'm thinking, "What is it that you really want?" Maybe those things are things that interest you, and in that case, that's great. I like living here because I live in Buenos Aires, and it's
Buenos Aires, and there isn't another Buenos Aires in this world. I considered a lot of other places around the world before moving here.
You seem so nervous and on the fence that it's hard to advise you. I thought about responding to some of your posts various times, but I wasn't sure what to say. I'm still not sure, but I decided to try to give you some ideas.
Moving to anywhere in the world like this comes with risks. You need to be flexible, and you need to be ready to change course if you decide that it's not for you. But if you can deal with the uncertainty and craziness, (a big"ïf"), I think you'll love it.
One last thing. Most of the people that are responding here and advising you, live here. They've been living here, and they continue to live here. There's a reason for that.