Have to agree - most places, apart from Montpellier, Béziers and maybe Perpignan, are crowded in the summer and dead in the winter.
An area which attracts you should be visited at its worst, mid-winter.
La Tramontane is disconcerting, le Marin always brings rain (usually welcome, unless it's an "épisode cévenol" in the Hérault and Gard which occurs more and more often).
The former languedoc-Roussillon is one of the Régions with the highest unemployment rates and therefore not recommended if you're going to be looking for work.
Things have changed in France since your OH lived here and he should research healthcare insurance, for example, depending on your status, The Service-Public.fr site is invaluable for up-to-date info on all things Administrative, and the threads in the Read-Me: Moving to France FAQs above might give you useful info in various fields.
Good luck with your search.

Our posts crossed! It's easier to set up a business now than last century. Do a Forum search (button top right) to find other threads concerning the line of work you'd be doing.