That is good that he has something to live for, it will keep him young for a few more years!! I had customers in their late 80s and early 90s that would come in and buy a MS 211, 251 or a DeWalt/Milwaukee saw, because their other saws were getting too big and hard to start, but they didn't want to stop cutting up their own firewood!! I had one guy actually wear out his DeWalt saw and got a new one under warranty...I probably spent an hour with him a day over a week hefting the saws and letting him ask all the questions he wanted. He was very happy with the saw. It was funny the week after he bought it, he came in with a few more questions and brought the owners manual and had many areas in there highlighted, he probably read through it 4-5 times!
Sometimes our friends need a little help to keep going and there is always something more we can learn from them!!