I guess it depends how much powering is expected. My CS27 has a Yanmar 8 hp 1 cylinder and it works, but not impressive against a headwind. As far as the stove, any fuel is better than alcohol including kerosene. There are a lot of options and as far as electronics they're getting both better and less expensive all the time. I'd take an ssb over a sat phone.
I'd also wonder about the rod rigging for offshore, especially if it's older. With a furler the best way to increase your storm sail options is to install a solent stay. Just inside the forestay and parallel on a releasing turnbuckle of some kind. Would need another halyard but no runners as it would almost be at the masthead. Then there is a place for storm sails or another jib for wing and wing downwind runs.
He hasn't bought the boat yet and we're redesigning it for him!