It will be harder to recruit in the current/forthcoming market, that's for sure - but so would finding any job!
Has he done any recruitment before? If so, good. If not - see my experience below!
The actual company make a huge difference. If your DH has little or no experience of recruitment to the level/in the sector the prospective job is, he must ask if there will be a structured learning or training path.
My experience is as follows hence the word of caution. On my first day as a senior management level recruitment consultant, I was given a list of 15 company names (household companies that you or I could think of) and told to "go recruit" . Bear in mind I knew nothing of the specialist sector in which I was recruiting. I was told this didn't matter, "just blag a bit".
Cold-calling the decision-making management tier above the level I was recruiting was almost impossible, because most of them have PAs to guard them against the likes of me, and HR were generally chilly and unhelpful.
I wasn't a total novice either - I had recruitment experience but at a much lower level.
It was incredibly stressful and I left after 11 awful months, having developed stress-related eczema.
I was mostly attracted by the money as people seem to think that it is a goldmine job. For those who can do it well, it is. However in my experience, senior level recruitment consultants are born not made and all those I have seen be successful in the industry at that level have been pretty much hard-faced, commercial, business people who work from dawn til dusk and then some. There is also a certain amount of "twisting the truth" ie bare faced lying to get candidates to spill about names and potential jobs/opportunites which didn't sit comfortably with me. On occasion I sat talking through a made-up job for 45 mins with a candidate just to get the name of his manager so I could poach him...