Based on 95.98% RTP: to clear the 35x wagering requirement on a $7500 bonus, you'd need to wager $262,500 total. At Queen of the Nile's RTP, the expected loss through the wagering period is ~$10553. 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.