See Shulchan Aruch Even Ha'ezer 76:5, which states that he may not take on such a job against his wife's will
(6-7) שו"ע אבן העזר - סימן עו (ה) יש לאשה לעכב על בעלה שלא יצא לסחורה
אלא למקום קרוב, שלא ימנע מעונתה; ולא יצא אלא ברשותה. (ואפילו אם נותנת
לו רשות, אין לו להתאחר, אלא חדש בחוץ וחדש בביתו) (טור והרא"ש). וכן יש
לה למונעו לצאת ממלאכה שעונתה קרובה למלאכה שעונתה רחוקה, כגון חמר שבקש
להעשות גמל, או גמל להעשות מלח; ות"ח יוצאים לתלמוד תורה שלא ברשות
נשותיהם ב' וג' שנים; וכן טייל שנעשה ת"ח, אין אשתו יכולה לעכב. (ואם
נותנת לו רשות, ת"ח יכול לילך בכל מה שתתן לו רשות) (טור בשם הראב"ד):
A woman may forbid [delay] her husband from going for merchant but to
a close place, so he won't avoid he period; and he won't leave but
[unless] in her permission. And even if she gives him permission, he
shouldn't be long, only a month out and a month in his house (Tur &
the Rosh) and also she can [has to] forbid him from going from short
[close by] period jobs to long [far] period jobs, like a donkey driver
wishing to become a camel driver, or camel driver to become a sailor.
And scholars [Talmidey Hachamim] leaving for Talmud Torah (even)
without their wives permission for two and three years. And [al]so a
hiker who became a scholar, his wife can't forbid (him). And if she
gives him permission, a scholar can go with however-much she gives him
permission (Tur in the name the Ravad)
And this is because a wife prefers (or might prefer?) the intimacy of her husband, even if it means a low standard of living, as it says in Kesubos 62b:
(1) אמר ליה רבה בר רב חנן לאביי חמר
ונעשה גמל מאי אמר ליה רוצה אשה בקב ותיפלות מעשרה קבין ופרישות:
Rabba bar Rav Hanan said to Abaye: If a donkey driver who is already
married wants to become a camel driver, what is the halakha? Is he
permitted to change his profession in order to earn more money from
his work, even though this will mean he reduces the frequency with
which he engages in conjugal relations with his wife? He answered him:
A woman prefers a kav, i.e., modest means, with conjugal relations to
ten kav with abstinence. Consequently, he is not allowed to change his
profession without her permission.
I am assuming that the couple could make enough money to survive, without taking on the better paying job, as this is usually the case nowadays.