Overexcited. Please help.

Hello!
After what seems like an age of jealously reading about everybody’s amazing adventures, I have unexpectedly got 3.5 weeks coming up (right now) between work contracts (that sounds dodgy but it’s a good unexpected as opposed to suddenly got fired or something!)

How does this sound?
*6/7 days in Buenos aires
*3/4 days to iguazu falls… From what I’ve read, Crucero del Norte looks comfortable and am willing to sacrifice a bit more time if the price is enorrrmously different from flying. Oh wait, just had a look at the bus website and it looks pricier than an aerolineas flight….I’m almost a bit disappointed! Is this a trick?!
*Up to rio and 10/11 days there with the possibility of a cheeky little trip to ilha grande in there (before/during)
So basically the main questions are:
How would you recommend spending time between the falls and rio? Bus to Sao Paolo and fly to rio? Or bus all the way…or go to ilha grande first….

Will it be too manic? Am I insane? I think I might have just got a bit too over-excited. It’s a balance between not doing too much to ruin it but at the same time taking into account I won’t get a chance to do a trip like this for a long time due to the way holidays at my job work.

Thank you for any advice :):):)

PS. Budget…not scraping it but not rolling in it! Willing to spend a bit more as it’s such a rare trip! Sorry if that’s too vague…
Speak Spanish fluently, portuguese not so much but I have learned it for a couple of years

Id say 6 days in BA is enough. It is a great city once if the people dont decide to give you a hard time for being british( if you are). Have a look at breaking the trip to Iguazu fall by going through Uruguay maybe. via colonial de sacaramento and then to salto( hot springs). Back into Argentina then over to posadas( day trip to trinidad in Paraguay) or stay in San ingnacio and see the jesuits ruins there). Before a four hour drive to Iguazu.

I only saw the Argentinian side fo the falls and in my opinion it is one of the best things i have ever seen.The greatest show on earth. I didnt want to spend money seeing the same thing on different sides of the border but it is apparently worth it.

I flew from Foz Iguazcu to RIo because it was cheaper than the bus and i wasnt to bothered in going to sao paulo on the way. I flew with GOL airlines and i think it was 100 pounds.

Ohhh, I have no idea if my reply posted or not. It doesn’t look like it has but sorry if this is a repeat…I go tomorrow and just wanted to say thank you for the tips. Had considered Uruguay and am now convinced I need to go!
Also just booked a flight with TAM up to Rio, 24 hours on a bus is precious time lost!
Thanks again
PS Yeah, I am British…which should be interesting..