Go for winter tyres on a spare set of rims. TBH swapping will take you (Dr B) about 1 hr to do both front wheels, chuck the removed ones in a corner of the garage and enjoy having tyres that work all winter
I did it on the wifes FWD Fiat last year and they are brill, not just when it snows but right through the winter - much better grip in deep water and when it is cold. The transition point for summer to winter tyres in terms of performance is ambient temp of about 6 degrees or below. I chuck these on in December and run them though to March'ish and it really makes a huge difference.
Then when the snow does arrive we are the only thing moving other than 4WD's - definitely the way to go.
Getting a decent selection of winter tyres after October is a real problem - UK stocks tend to sell out quickly as they are not that popular. Have a look on
http://www.tyres-pneus-online.co.uk/ they are a French outfit but prices include delivery to the UK. Because Europe has a much bigger market for winter tyres there stocks are much larger and I could get the tyres I needed straight away.
Then just took them to my local tyre fitter who will charge £5-£10 per rim to fit.
HTH
MM