Based on 96.35% RTP: to clear the 30x wagering requirement on a $300 bonus, you'd need to wager $9,000 total. At Floating Dragon's RTP, the expected loss through the wagering period is ~$329. This is one of the better deals in the AU market.
Pokies are designed to be entertaining. Set a budget before you play, take regular breaks, and only gamble with money you can afford to lose. If gambling stops being fun, help is available.