You signed a contract to borrow X dollars from the bank and pay it off over a period of time. If you "walk away" from that and don't pay the bank back, the bank will see to it that your credit rating will reflect that you don't pay your obligations. No one will loan you money for a very long time. You may even have a hard time renting an apartment like the genius author of this article says you should do.
Seven years, most likely. Ten max.