Warren Buffett says along with equities, single-family homes are a very attractive investment right now. Appearing live on CNBC's Squawk Box, Buffett tells Becky Quick he'd buy up "a couple hundred thousand" single family homes if it were practical to do so. If held for a long period of time and purchased at low rates, Buffett says houses are even better than stocks. He advises buyers to take out a 30-year mortgage and refinance if rates go down. Buffett revealed that he put 175 million euros into each of eight European stocks on behalf of Berkshire Hathaway at the end of 2011, but did not reveal the names of those stocks. He also said Berkshire bought just a "few" shares of IBM [IBM 204.72 0.94 (+0.46%) ] this quarter. He would have bought more but the price went up. Buffett tells Becky he probably won't buy a tech stock again, but if he understood a company and liked its management and price he wouldn't rule out another tech purchase. Buffett says if he could only own one bank stock it would be Wells Fargo [WFC 33.37 0.04 (+0.12%) ] and Berkshire also added to its position in that stock during the current quarter. Read more