Sure the pigs will be fine over winter if they have a dry area, water and industrially produced food. But will you be OK? Visiting the pigs twice a day every day, breaking ice or giving them the odd warm meal is really hard work. It will take some"drive" some days to get out and visit them. We finsihed ours a few weeks back and now it is like I am on holiday ( that and the cockeral died - so I get 2 hours more sleep).
Also - feed costs?