Starters take a lot of power. Just a regular electric switch will not work because the wires have to be so big to handle the high Amp load. When you think of Amps, think of Volume. Think of Volts as pressure. You can have a lot of pressure in a small wire, but it must be contained.
Scion is a sub-brand of Toyota and a niche trade name aimed at young buyers. Founded in 2002, the Scion line is composed entirely of small vehicles powered by four-cylinder engines, with most models priced below $20,000.
Toyota manufactures the RAV4; which is a smaller vehicle of this type, and costs considerably less. I have high regard for this model; which has grown larger in recent years (along with its price tag). Toyota also manufactures a still smaller line of vehicles called Scion.'m, also, seeing some 150,000 or 174,000 which makes me think that, even at a 100,000 there is enough life left that it's worth the price OR those with even higher mileage are the exceptions.