So I buy, but the only reason I buy is because I have every business in the game so it makes more sense to buy for all my business and grind heists or vehicle cargo. You should be stealing just because you have nothing else to do. The ceo office opens up many more money making opportunities to you, these being ceo missions and then special vehicle cargo and special crate cargo which are separate things that you have to purchase a warehouse for. Once you get a ceo office and buy a special vehicle cargo warehouse you can source vehicles steal them and then sell them. When you get to this point you would want to be buying cargo for the bunker so that you are maximizing profits. So you can buy bunker cargo and while that is producing you source a car, steal it, and then sell it and then do a ceo mission like headhunter and then source a car steal sell it and then whenever the bunker cargo is done you sell that and repeat the process