A new electric golf cart found under Decor / Misc. Decor, costs 0.
You need Ambitions and to place the package in both the mods/packages (Sims3 ) directory and in the "The Sims 3 Create a World Tool/ Packages" directory for the item to show in your game. There is an earlier post explaining how to install items in CAW.
Importing packages into CAW
Electric golf cart (MediaFire)
Golf course - hole 1 for CAW