A golf cart is all about saving energy, to improve your game. To get the most out of your golf game, you'll want to invest in a push cart, not lugging around a pull cart behind you - that can get almost as tiresome as carrying your clubs on your shoulder.
There is however, the smartest of all options available on the market, these are push/pull carts, they come in at a bigger price range and may well be worth upgrading to once you've decided a cart of some kind is for you.