I lived on a 27 footer for 2 years with my husband and a small dog spending that time in the Keys and the Bahamas and mainly at anchor and with no shower and no refridgeration and very little money.
To each their own, but that arrangement sounds like a nightmare to me.
The first thing I would toss would be the yappie "small dog". Those sort of rodents would never have evolved but for the intervention of man with Natural Selection. At the first sign of a dog "mess" on board, over he'd go. There's no way the Captain is going clean-up after little Poopsy on my boat.
The second thing to go would be the wife. "No shower and no refrigeration" pretty much eliminates both reasons for keeping a wife around in the first place: cooking during the day and companionship at night. Next port, she's gone, too.
Having paired things down to just me and the 27-footer, the situation would then seem livable to me.