Financing your own home: "Shit, now you have a huge house with debts on your back"

Well wall street betting friends build a house. I find both of them completely crazy: I day trade with a time horizon of seconds to minutes, which means I analyze probabilities and market structures of large stock indices, such as the S&P500 and the Nasdaq. All I need for the job is fast internet, nothing else, I can do it from anywhere. I sometimes plan my swing trades over days or weeks. I work with clearly defined risk management. Whereby I am in the B