My bad, I stupidly failed to mention that I don't intend to go the whole hog in this lifetime, not after your wise and carefully considered advice!
I was thinking along the lines of only partially building a Body of Light for two reasons: this-life benefits in easier lucid dreaming and astral projection (as Between the Gates suggests) and to plant wholesome karmic seeds for my future incarnations. Yes, sooner or later I'll naturally stop being reborn in a material body, but I figure greasing the wheels of Nature can't hurt.