Financial talk

I recently moved to the US from Canada and have yet to establish my credit rating. I have a well paying job and would like to purchase a condo. My credit score would be sufficient in Canada. To complicate the situation, I have a sum of money invested in Canada that I want to use as a down deposit, e.g., in excess of 40k. How can I legally "launder" that money across the border, avoiding all taxes and fees. Also where can I get a wholesale exchange rate? In the likelihood that the deposit is not enough, actually it definitely isn't, is there a way to have my parents co-sign the mortgage. My father is a Canadian citizen and my mother left the US in her mid-20s (now 50+). Is there a Canadian bank with operations in the US, or vice versa, that could be of help? Can a US bank take collateral from another country? I have a great relationship with my parents and they have offered to help in anyway possible. Thanks!