Firstly, congratulations on your offer!!
Good to see that you are doing your homework and I do hope your offer is generous enough for you not to have to make any sacrifices in return. Remember to check basic things like housing allowances, return trips, education expenses, etc. that I'm sure more qualified people than myself can help you with here.
To try and answer your question specifically re: your husband, it is certainly alot for him to give up. If his present position as regional president is with a multinational, he could try to leverage that assuming they may have a local office here (or even in South Asia), otherwise he could realistically be facing an uphill battle. Even if language was not an issue, the unemployment rate is relatively high meaing there are a number of qualified (local and expat) people looking for employment here. Also as you probably know, network consulting (similare to IT?) isn't the booming field it once was just a few years back...
That being said, there are a number of recruitment firms -- some better or more specialized than others -- who can help, and I don't mean to discourage you both however, so don't take it the wrong way! It might be worthwhile for him to send out his cv and see if there is any positive feedback from the local firms before taking the big plunge.