I know it sounds crazy, but Mars One has a plan send humans to Mars by 2023. They're going to open applications to anyone interested soon. The only catch is that you probably aren't coming back...
And they're going to pay for it by turning every part of the project, from planning, to launch, to landing, to the daily lives of the people who will live on the red planet into a reality show.
That's right. It's The Truman Show in space.
But their plan is actually pretty realistic: