In reply to lukeap:
On a more positive note. You could make enquiries with Plas y Brenin about hiring kit (boots, crampons and ice axe). Providing you have full set of waterproof s and reasonable amount of fleece type layers (even really cheap ones) you don't need a primaloft jacket. I managed for many years without one and now it just lives in the bottom of my rucksack for 'emergencies'. You'll probably be on the move all day so will keep warm.
There is still snow high up and some pretty big snow fields to practice wearing crampons. Its also 2 weeks off so could be much more wintery (or less....). A winter skills course in Snowdonia is rarely going to be as good as one in Scotland but if you have very little experience you'll get some good training done if there is some snow. If your instructor is worth his salt he will give you a good mountain experience regardless.
You could book one in Scotland and spend 2 days being blown over or ploughing through knee high snow. Winter is always a bit of a gamble. Keep the faith. It might be amazing!!