Just thinking out loud - I could see your idea making some sense for say certain valve train components; You want to move oil at a lower engine speed, potentially reducing wear. However, I tend to think the greater risk is to bearing components. Fluid bearings require a certain level of oil pressure to avoid metal on metal contact. I don't know if the starter speed is sufficient run the oil pump at a speed which will "float" the bearings. I could see your procedure causing more harm than good. Again this is all speculation.
Modern engines are designed to outlast the vehicle. I'd just start the engine normally. If you're worried about cold temperature behaviors, run a synthetic and you're probably ahead of the game.