God grant me the serenity
to accept the things I cannot change;
courage to change the things I can;
and wisdom to know the difference.
First of all you and your wife are the only people who can answer this. Most of know what we need to do, it is only a matter of working up the courage to do it. You know inside what you need to do.
My thoughts about your lovely wife are this. My husband used to drink. Fortunately it was not for years because I don't think I could have stood it if it were. He realized on his own that he was in too deep and stopped. I know that he has grown a lot and has no desire to return to drinking. That is what my head knows, what my heart knows is that there is still a fear that it could happen again because alcoholism is such a strong desease. Of course the only way I will know that he won't drink again is to continue my life with him through all of the changes that happen naturally.
Love shouldn't hurt. To me that means that the sacrafices that we make for those we love should also not hurt. Your drinking hurts your wife. Your current job hurts you. Your old job and what it did to you hurt your wife. This is too big for both of you to see objectively, get some professional help to work this out. Do you have a minister or therapist that you can see soon so that you have a chance to work this through before the job offer expires?
This sounds like a trust issue. You trust yourself to go back to a well paying job and not fall back into old drinking habits. Your wife remembers those old days and doesn't trust you to stay sober. You've obviously rebuilt some of her trust by the years of sobriety; if you tackle this and succeed, her trust will continue to grow. If you go for it and then drink, you'll loose all you have gained. Difficult decision for both of you.
I agree that counseling would help right now - reaching a sort of arbitration type of agreement so that you both will feel safe to move forward. Good Luck! 
Hi Ya James, I think it should attest to your strength to stay sober when you have alcohol in your house and your spouse is drinking in front of you and you resist the temptation to follow. I can see where your wife would need reassurances from you that you would not go back to drinking or fall back into those old habits once you went back to your prior position. Sitting down and discussing this together would be a great idea and perhaps writing out a list of pro's and con's to you taking the job. You could even go so far as to write out a contract with her saying something like should the job start to demand too much pressure on you and you start to drink again that you will terminate your job and go to AA or rehab. Maybe something along these lines would help make her feel a little more secure in your word that you wont do this.
I am sure you will get some more suggestions hopefully…please let us know how it goes…good luck
Victoria x