Let's get this out of the way now: There is no GTA 5 money cheat. In single player there are GTA 5 cheats for pretty much everything, from making yourself invincible to maxing out your health and armour, but there isn't one that'll give you an infinite bank balance.
Otherwise, what does a diamond casino membership do?
Standard Membership to The Diamond Casino & Resort is GTA$500, which includes a welcome gift of 5,000 Chips and grants access to several services and activities the Casino has to offer including Valet Parking.
Not only, what's the most profitable business in GTA V? Cocaine production
Next, how much money do you get in the Diamond casino heist?
According to Reddit, the maximum Diamond Casino Heist payout is GTA$2.1 million. While that's a persuasive sum, note that Lester will always take his 60k cut.
How much is the casino in GTA 5?
Well you can buy basic membership to the casino for $500. This grants you access to the facilities at the resort – including valet parking. To get the least expensive Penthouse – the Crash Pad – it costs $1.5 million.