Land invasion would mean very high casualties, and I doubt you can do it with just occupying Hormozgan and Baluchistan, seeing that the Iranians can use a shipping strike, which is extremely mobile; you are going to need an exclusive zone and buffer for early detection. That would mean large casualties, and you can't do it unless both Pakistan and Afghanistan play ball, because Turkey and Iraq are on the other side of Iran, and you can't just use amphibious assault to do that. It has to be a ground op.
Which is why I said a ground invasion is very unlikely.