Brasil itinerary + Buenos Aires for a weekend + budget

Hi guys,

I consider visiting Brasil this year as I have found really nice cheap flights from Europe around 500 eur for a round trip, it is open jaw so I need to go to Buenos Aires first which I heard is really expensive at the moment yet a weekend sounds tempting, just for sight seeing.

I am not sure about the Brazil prices tho, lets say we are not backpackers anymore, but also we do not need fancy restaurants (but tends to go out for a few drinks at night ;))

First of all I would like to kindly ask you if you think that around 70$ per person / day(excluding accomodations and flights) would be enough for comfortable travel and to actually enjoy Brasil?

Second of all, I prepared really early version of itinerary that I would like to consult with folks with better experience ;) We have visited ~ 45 countries, including South America, so safety is of course a concern but I am aware of the situation and possible risks. Not sure about Paraty / Ilha grande part I think i would need some more due diligance - we are mid 30, love to meet people, love nature and to party a little bit but we in general we like to spend our time active so not sure if these destinations are suitable for us.

Thanks in advance!