You can also try FSI in seattle, I believe they also have a sim. That said, with your temps, the 3 may not be your best bet. the garretts don't have a lot of steam in a high density altitude operation, look closely at the charts to see if you will make the second segment requirements at the airstrips/loads you will be flying into. It is however hard to beat for economics, get a good engineer though as they can be quite labour intensive.