I am going to build it with 10' walls. If I decide to put in a lift I will build on a higher wall stall for that either in front or in the back of it.
Because of my town's building and zoning codes, I was limited in height when I built my new garage last year and couldn't have walls tall enough for a lift unless I went with a flat roof.
However, I came up with a plan for a trussed ceiling and garage door tracks mounted on an angle so I should have clearance for a lift even with my 9' walls.
Just an idea that might help you out with your planning.