HSBC is only the name here, so your account in the states won't work here.
This is true, but only to a point. You can use your HSBC debit cards here, what you cannot do is open an account from home ( I tried and my bank were embarassed to find they could not do it) The usual limits apply but HSBC will not charge for the use of thier cards.
If you try to wire money into the country to a bank the government takes 30% and freeze it for a year, unless you have a visa with residency.
This is also sort of true, again the best way is to deposit money at home and withdraw it via your debit card. (bring the max with you $10,000) Signing up for property is the only way to get around the money issue, but that brings a whole lot of other problems: see
http://journals.aol.co.uk/tangogales/bob-buys-in-bsas/
Lastly, my personal view is that it is not quite as expensive as some would have you belive, it is all about where you set your levels. Stick with the locals and stay away from the tourist areas. I can buy lunch for two for less than AR$10 ($4?) to eat in my appartment, but hot and with free bread, even throw in a plastic knife and fork if you need it. Taxis seem cheap, but can soon add up. The subte is cheap as are the collectivos (although the routes are still a mystery to me) Finally if you want to phone home, forget your mobile, you will need to sell an organ to pay for it. Go into a locotorio, they are metered so you can see what you are paying, and I find calling my daughter cheaper than calling from home. N.Wales to Bournemouth (UK)
Remember nothing ventured nothing gained.