Travel / Best place to exchange money in Poland? [98]

I'm going back to Poland to have some dental work finished up in Jelenia Gora. Last time I was there I used ATMS for zloty and it worked out fine. My son is coming with me this time and insists for some reason he wants to carry cash and exchange it at banks for zloty. I was under the impression the ATM rate was cheaper, the exchange rate was better, and of course it's more convenient to use ATMS. But, I could be wrong. Anyone know which is better? Also, banks here in the states are open all day and on saturdays. How about there?

Travel / Renting a car in Jelenia Gora [4]

I will be in Jelenia Gora for three weeks in July for some dental work. I have looked around online and all I can find are exhorbitant rates (>1,000 USD) at the airport in Wroclaw. Does anyone have an online source that might have local car rental agencies in Jelenia Gora? It comes up on Google but then it ends up to be Wroclaw. Just on the off chance.....