As the others have already said, it depends what you want - you're going to have to be fairly motivated to do a 1000 mile round trip for 2 full days in the house, not to mention the cost - petrol and ferry as you've said. The potential income bit struck me too - France is a little awash with Brits trying to earn a living - have a look at the auto entrepreneur's group, especially Emily Monté's experiences in Brittany and her thoughts. Having said that, if it's your dream and you want it to work and have the financial backing to make it work, then it will. There's nothing worse than saying I wonder what would have happened if we'd ... sometimes you just have to go for it, but knowing the full picture firs tmakes the leap easier ;-)