Work on him for a few months. He must have built up some serious contacts over the years. His pitch is straightforward. HP can't actually support their products anymore, they don't have the staff. He knows the hardware inside and out. Sell support contracts. Snipe the best after the layoffs.
You don't look for a job when you need one. this rumor is going to terrify customers. Since he has good personal relationships with those fortune 1000, he needs to monetize that. He must have some idea of what HP charges for his time. He can send the new guys, and come in to rescue at the end.
I know this sounds crazy. Think really hard about it though. There isn't anyplace that will hire him at 100k. He needs to set up his own shop. Think of it this way, 0.05 < P(new_biz_fail) < 0.1. What is the chance of him getting a good new job in 6 months? i'd guess less than 10%. With your mom, he needs to bring in serious cash. He's in a position to do that. If he picks good helpers, it won't consume his life, anymore than the current job. He really only needs 1 contract, and can build from there.
It sounds super scary. Hell, it is super scary. If he needs stability for the next 15 years or so, this is a really good way to do it. Really, in his position, as good as he is, it's less scary than going and looking for work.