one tire just need to install Jxstuds about 150pcs, and a piece tire studs, the normal studs just cost 0.03USD/pc. then one tire just need about 5USD, and can use about 2 years if you use on the right way. and studding is available for as low as $15/tire (though drivers will need to buy special studdable tires) while snow tires typically go for between $100-$400 apiece, depending on the make and model of the vehicle. People can remove studs themselves.
So put studs in tires is the cheaper and safe way than others.