Will I clear this bonus?

Worked example

$100 × 35× = $3,500 turnover. At $1/spin and 400 spins/hour that's $400 of turnover per hour → ~8.8 hours of play.

If you have 30 days × 1h = 30 hours of validity, you have a huge buffer. Tight buffer = either bigger bets (caps usually apply), more hours/day, or pass on the bonus.