How can u get free money in gta 5 online on xbox 360

i need to kknow how to get free money on gta 5 online becuase i cant afford a high end appartment on xbox 360:help:

Well nothing comes for free! Just because it doesn’t cost you currency, doesn’t mean it won’t cost you on time.

There are multiple ways you acquire cash in GTA5;-

The stock market is one source.
Doing the missions that various in-game characters offer you, pays well on a first time play through.
Selling high-end vehicles will net you some money.
Going bounty hunting works too!
You can also rob stores/shops.
You can also search forums for people offering a ‘cash drop/editing’ service but these are not always Free.
Finally, the fastest way to gain money is by purchasing Cash cards via the in-game Store.

That’s all I can think of from at the moment. Hope this helps!