Harvesting Solar Power from Space

Soon we will have solar power conducted from space right to us. How cool will that be? But to build the satelitte that will give us the solar energy will cost about $4 billion dollars. Now I know that this will benifit mankind but isn't it a little ridiculous to pay that much money for 1 satelitte. Anyway it'll be up and running in 2030 and if that built solar powered cars we wouldn't need any gas! Then everybody would stop complaining and saying stuff like: " Why do we have to pay so much for some gas that will be gone in about a week or 2."