Like many of the properties in the game there's no definitive answer.
Below are the most crucial things you should purchase when starting off – and later on. about Best/most beautiful house in GTA Online? first, complete heists and get Kuruma and Insurgant, Bunker, you can use that to generate alot money passivly and only need 50k to be a vip to access it, all you need is friends to sell it when full otherwise sell it yourself around the 100k mark.
Best investment is a high class apartment for 200k, than grind through the heists.
