“Financing is available for this purpose from a few banks, but at less favorable terms than in the USA. You won’t find a regular 30-year mortgage, for instance. The best most banks offer is a five-year mortgage on 50% of the purchase price with a balloon payment at the end. Interest rates are higher, too. After five years, you can roll over the mortgage for another five years. But you might not need to… a recent change in the law lets you sell your real estate five years after you qualify for citizenship. You can even sell it to someone else seeking economic citizenship.”
http://nestmann.com/how-to-finance-a-second-passport-and-more