[PsYcNeT]

I've decided to make the winter tire jump.

So if I have the storage space, the wherewithal and the means, is it better for me to buy winter wheels+tires, a jack, axel stands and a torque wrench and install them myself, or do what most people do and pay someone to swap them onto my wheels?

Is there any downside or danger (besides the obvious ones) of changing them yourself? Will tire/wheel retailers pre-combine and inflate anything I buy?