I'll echo the same sentiments about a bike being 100% transportation for you.

It sucks. Riding in bad weather sucks. Gas milage is great. Sunny days it's great. Heat on a cold day is better, glass and metal on a rainy day is much better too.

Not a good idea IMO. I had a cousin who did that and he regreted it when winter came. Trust me, get a beater and a bike.