A friend of mine did some project work for a company that was planning a theme park (called "Wonder Land") in Nigeria. Their budget was $250 Million. You can probably multiply that by 2 for first-world countries.
This is the process to given you best feature to save power of better easily must be show battery icon taskbar in system easily so share the update to all web users for better working.
Eeesh alexia on blurtit at school...naughty girl =)...but it can cost like a few hundred million to build one (a roller coaster can cost like 10/15m to build due to the research and planning beforehand =)