Could Buying Costco Today Set You Up for Life?

Costco (COST 0.88%) is a store I frequent almost weekly, thanks to the good prices and the shockingly fresh produce. That said, I've never owned the stock, even though it has the type of impressive dividend record that attracts my attention. Sometimes I wish I had bought it, though, because paying full price for a great company can often lead to strong returns. But what about buying it today? Would adding Costco to your portfolio right now set you up for a lifetime of strong returns?Costco's business model ...