Sorry, Doris Stokes has passed to the other side.
It is within the gift of the court. Much will depend on the details of his arguments and how well he presents them. If he is banned, what would or could he do? The fact that he would lose his driving job does not in and of itself mean that he could not find a non-driving job. What are his ex's circumstances? The bench will want to know.
Received wisdom suggests that hardship liable to be suffered by innocent dependents carries more weight, than that which the criminal scum that brought this upon himself would suffer.
What we consider the likelihood of him keeping his licence, based on negligible information is perhaps even more pointless than the question itself.
If the court do not find that he (or others) would suffer exceptional hardship, they must ban him for 6 months. If they do, they can reduce that ban, potentially to zero. All that matters is what they bench on the day decide - unless he does not make an exceptional hardship argument, in which case we can tell you exactly how likely it is that he will get a 6 month ban.
If you/he want advice on how to present his argument, (i.e. ignore irrelevant points and evidence that relevant points), we can offer advice on his draft argument.