Should he do more Hajj or is once enough?

Is it good to do more than one hajj or is it better to do only one hajj?.
Praise be to Allaah.
With regard to what is obligatory, Hajj is only required once in a
lifetime. It was narrated that Abu Hurayrah said: The Messenger of
Allaah (peace and blessings of Allaah be upon him) addressed us and
said: "O people, Allaah has enjoined Hajj on you, so perform Hajj." A
man said: "Is it every year, O Messenger of Allaah?" Heremained silent
until (the man) said it three times. Then the Messenger of Allaah
(peace and blessings of Allaah be upon him) said: "If I said yes it
would be obligatory andyou would not be able to do it." Then he said:
"Be content what I leave with you, for those who came before you were
destroyed because they asked too many questions and argued with their
Prophets. If I tell you to do something then do as much of it as you
can, and if I tell you not to do something then abstain from it."
Narrated by Muslim, 1337.
It was narrated from Ibn 'Abbaas that al-Aqra' ibn Haabis asked the
Prophet (peace and blessings of Allaah be upon him): "O Messengerof
Allaah, is Hajj every year or just once?" He said: "It is only once,
andwhoever does more than that, it is a voluntary (act of worship)."
Narrated by Abu Dawood, 1721; classed as saheeh by al-Albaani.
With regard to what is preferable, the more a Muslim does of Hajj, the
better, even if he can do Hajj every year. There are reports which
encourage doing Hajj a great deal, such as the following:
1 – It was narrated from Abu Hurayrah that the Messenger of Allaah
(peace and blessings of Allaah be upon him) wasasked: which deed is
best? He said: "Believing in Allaah and His Messenger." He was asked:
Then what? He said: "Jihad for the sake of Allaah." He was asked:Then
what? He said: "An accepted Hajj." Narrated by al-Bukhaari, 26;
Muslim, 83.
2 – It was narrated that Abu Hurayrah (may Allaah be pleased with him)
said: I heard the Messenger of Allaah (peace and blessings of Allaah
be upon him) say: "Whoever does Hajj for the sake of Allaah, and does
not utter any obscenity or commit any immoral action, will go back
(sinless) as on the day his mother bore him." (al-Bukhaari,
1449;Muslim, 1350).
3 – It was narrated that 'Abd-Allaah ibn Mas'ood said: The Messenger
of Allaah (peace and blessings of Allaah be upon him) said: "Make the
Hajj and 'Umrah follow each other closely, for they remove poverty and
sins as the bellows removes the dross of iron, gold and silver, and an
accepted Hajj brings no less a reward than Paradise."
Narrated by al-Tirmidhi,
And Allaah knows best.