I have friends in my community that I can borrow all the tools from. Or shoudl I trust the job to a contractor?
I have not had good results with studs. They are about as effective as snow tires on ice and nowhere near as effective as snow tires on snow. On a 2WD pickup they will do even less - you really need chains. Cable chains are good for passenger cars but you probably want light truck chains. At work we use the chains that weigh about 10 lbs each and chain up all 4 on our 4X4s but we go way off-road in axle deep snow and often have to dig ourselves out. There are some quick-on, quick off options instead of conventional chains at a price. Spikes Spiders, for example. My wife tried them and they worked great until one of the center hubs came off (they just clamp onto the wheel lug nuts) and one side was lost. We never found it I guess the snowplows threw it somewhere. That gets expensive in a hurry.
The more massive the object, the greater gravitational force it will have in total. However, say you have a planet like Jupiter, which has a large volume (how much space a piece of matter occupies). Jupiter also has a lot of mass (amount of matter an object contains ie how many moles of particles). So, the gravitation force will still be strong, but it will be spread out over a larger area. If Jupiter was lesser in volume but the same mass, the gravity would be stronger, but would affect a smaller area. In total, however, if you give more mass to an object but take away some volume, you give the gravity field a larger pull, but the effect will be at a smaller distance (ie pulling other objects with its gravity).
Have you ever heard of chains. True they are a pain to put on in a blizzard, so maybe you don't want to hear that. If you use winter tires on summer roads, they will wear out before you are half way through the summer. So don't plan on needing to put studs back in them come winter.
