Tom,
The only way you'll know if it suits you is to go there. You obviously know what the money is like already if you've had an offer. Unless you're giving up a good secure job, what have you got to lose (after all if your present job is that good I guess you wouldn't be looking elsewhere). Just make sure you don't burn any bridges when you leave your present job and then if the new one doesn't work out, you may be able to return. My own experience has been that although the grass always looks greener, it rarely is - it's just the same patch of grass with a different fence around it.
It seems as if Yarba is either there at the moment or has been recently and it doesn't sound as if it matches up to his European? standards. You seem to be working in Africa so maybe the conditions there won't seem so different.
Sorry, haven't been there (only to a different piece of the Gulf many, many years ago) so this probably doesn't help