I recently bought gta5. I'm trying to buy west coast customs.WTF?) and that left Franklin not having much money for most of the game. Stay on top of your GTA 5 money and rake in those bills using our tips to build and maintain a healthy bank balance. Doing missions: Completing missions for characters such as Lester and Martin Madrazo will often reward you with a large sum of cash. GTA Online can be obtuse at times, so this guide will help newcomers understand how to unlock the new expansion's content.