If you want to get to the moon, you need to spend an enormous amount of resources developing, creating, testing, and deploying a variety of spacecraft and technologies. All you need is money. Lots of money. For decades, the only entities with enough green in checking accounts were large governments or multi-national consortia. But nowadays we have some absurdly wealthy, and absurdly motivated, individuals who have stars in their eyes and designs on space missions of their own.