the fridge tends to be one of the friction points for cc-ing/working liveaboards. Work patterns means you only really move every other week end, and whats more, you are unlikely to move very far in one go.
Like many others, despite a good sized battery bank and powerful alternator, I find the headache of dealing with the power requirements of the fridge is not worth the aggro. Instead, I used a coolbox kept in my un-insulated engine room.
An 80w solar panel through an mppt controller meets most of my lights and pump comsumption, even in winter, provided I moor in open spaces.
In the summer the panel, if angled correctly allows me to use the fridge, providing I do a little bit of engine charging, maybe 2/3 hours every week..
I dont regard home every night to run my engine as a viable option.