A planer wide enough for cabinet doors would be expensive... I probably would not ever need to take off more than 1/16".. So I'm kinda getting the impression that with 60-80 grit that might take 6-10 passes?

For the most part, I would generally be using it for sanding blanks after gluing edge to edge.. Just to get them flat and smooth.... prepped so that uncarved areas are pretty much ready for finish after carving a piece...