Based on 92.12% RTP: to clear the 40x wagering requirement on a $2500 bonus, you'd need to wager $100,000 total. At Heart Throb's RTP, the expected loss through the wagering period is ~$7880. Manageable if you're a regular pokies player.
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.