How about plane tickets to Southern Spain?
But if you can't afford that, and plan to try a winter tour anyway, here's my advice-- but I haven't done a winter tour in 20 years!
1. pack heavy-- most of the time I'm totally against this, but it's winter and your going to need extra gear.
2. Don't plan a whole lot of miles. Back in my teen years, I did a bunch of 3 day winter tours and I covered less than 70 miles total each trip. I'd ride the same route in 1 day in the summer, camp and ride home by noon. Riding a bike on icy roads isn't easy, there isn't much daylight, and the cold drains the energy out of you.
3. Have a back up plan ready if you need to bail. And don't be afraid to bail if the going gets really tough.