Transitioning from one type of pilgrimage to another in Hajj

This message is from Zayn al-Din Ali Basam in Riyadh. He asks: Is it permissible for a Muslim to transition from one type of pilgrimage to another, and what is the best of the types of pilgrimage in Hajj?
Answer: This question requires detail: If one enters the state of ihram for 'Umrah, he may transition to qiran, entering ihram for Hajj along with 'Umrah, becoming a qarun, if he has the sacrificial animal (hady) with him. If he does not have a sacrificial animal, no camels, cattle, or sheep, then it is better that he does not transition, but remains in his state as a person performing 'Umrah. When he circumambulates, walks between al-Safa and al-Marwah, and shortens his hair, he exits the state of ihram. However, if he has a sacrificial animal, such as a camel, a cow, a sheep, or more, then the Sunnah is to enter ihram for Hajj; because the Messenger of Allah (peace and blessings be upon him) commanded that, saying (peace be upon him): .
The presenter: Meaning he becomes a qarun?
The Shaykh: Meaning, if he enters ihram for 'Umrah alone, then he wishes to... Hajj, if he has the sacrificial animal with him, this is the Sunnah. He recites the talbiyah for Hajj along with 'Umrah and becomes a qarun thereafter. As for if he enters ihram for Hajj alone, he has no option but to remain in his state until he makes it 'Umrah. Either he continues to Hajj, or he breaks the 'Umrah, circumambulates, walks between al-Safa and al-Marwah, shortens his hair, and makes it 'Umrah, as the Prophet (peace and blessings be upon him) commanded his Companions who entered ihram for Hajj and did not have a sacrificial animal with them to make it 'Umrah.
So the result is that he has situations:
The first is: that he enters ihram for Hajj alone, without 'Umrah. If the time of Hajj is near, he completes his Hajj, and praise be to Allah. If the time of Hajj is not near, meaning he has time, then it is better that he makes it 'Umrah. He breaks it, meaning: he intends it as 'Umrah, circumambulates, walks between al-Safa and al-Marwah, shortens his hair, and makes it 'Umrah, as the Prophet (peace and blessings be upon him) commanded his Companions to do.
The second situation: he enters ihram for 'Umrah alone. Then he may make it qiran if it is in the months of Hajj, if it is after Ramadan. He may recite the talbiyah for Hajj along with 'Umrah, becoming a qarun, especially if he has the sacrificial animal with him, in which case he recites the talbiyah for Hajj as commanded, and becomes a qarun thereby. He does not exit the state of ihram until he exits from both on the Day of Sacrifice. And if he remains in his state of ihram as a person performing 'Umrah, that is better until he completes his 'Umrah, except if he has the sacrificial animal with him, in which case he recites the talbiyah for Hajj along with 'Umrah, and remains in his state of ihram until he exits from both on the Day of Sacrifice.
As for the one who entered ihram for 'Umrah and does not have a sacrificial animal with him, it is better for him that he does not recite the talbiyah for Hajj along with his 'Umrah, but remains in his state of ihram for 'Umrah until he completes it by circumambulating, walking between al-Safa and al-Marwah, and shortening his hair. Yes.