$2,500 - $3,000 would be an incredibility low cost per hour. If you have a look at his tool on Avbuyer.com
Aircraft Performance Data from Conklin de Decker at AvBuyer.com it would suggest that the variable cost per hour is between $4,600 - $5,300 for a E190 - A318. However once you start adding in your fixed costs and owners requirements I suspect that cost per hour would be much much higher, with the sky really being the limit.
I would suggest that $8,000 - $9,000 per hour is more likely cost per hour