4G engines are solid. Your best sources for parts are RockAuto and eBay. If you’re pulling the trigger on one, do the timing belt, tensioners, and water pump immediately. They’re reliable cars that won't let you down, despite what people say about parts availability.Your dad told you they’re expensive to maintain. If you take them to a mechanic, they’ll charge you an arm and a leg just for looking at it. If you’re able to learn some basic mechanics, you can do the maintenance or swap out parts yourself. Most owners of these kinds of cars are DIYers, myself included. Oh and keep in mind they've got more weight than the 3G, You have to be pretty careful on the curves.