That's a huge achievement, people may not understand how difficult that is, well not difficult but how expensive it is, so I wanted to stop and say that gambling that much in 4 months takes a lot of courage or at least millions of dollars at your side so that if you lose this you do not get upset about it.
Not really millions of dollars.
GOLD rank you can achieve with around more than 200,000-350,000$ total wagering at least will give you GOLD rank with 60% fills up the bars and that wagering, so maybe with around 5K$ or 10K$ as long you can keep the balance alive you can easily to archive that wagering amount.