I wouldn't exactly say 'no problems with mountains' on the 1-40/I-26/I-81 route. On I-40 west, you'll have 4 very curvy miles up at 6% just past Old Fort (up the eastern Continental Divide). Then on I-26, you've got a straight 6% climb of about 4 miles to the NC/TN line (beware of the curving dip partway up), followed by 3-4 miles of very curvy 6% downgrade entering TN. I think there are 3 runaway truck ramps on that stretch.
To get onto 'Future I-26W' as you go thru Asheville on I-40W, take I-240W from the east side of town.
Jim, "Many people stop looking for work when they find a job."