I actually did two 3 day trips to Montreal relatively recently. Here was my hobby budget breakdown:
Trip 1
Day 1: 2hr duo ~ $750
Day 2: 2hr duo ~ $750
Day 3: 1.5 hr session + 2hr session ~ $650
Total = $2,150
Trip 2
Day 1: 2hr duo ~ $750
Day 2: 1hr session + 2hr session ~ $600
Day 3: 3hr session ~ $600
Total = $1,950