@north,
No, with $50 billion dollars, you'd be just another sucker with too much cash and too little sense. They'd spot you coming a mile away. The entire space program which culminated in putting people on the moon in 1969 cost on the order of $70 billion dollars, so you wouldn't even have that much to start with. Furthermore, those were 1950s and 1960s dollars--in today's terms, that's half a trillion dollars or more. You don't even have start-up capital to set up mining programs in space. If, however, you intelligently invested $50 billion, you could someday have earned enough money to get the project started.
Being "frugal" is meaningless. If you want the European Space Agency, or the Russians or the Japanese or the Chinese or NASA to boost anything into space, you're going to have to pay the going rate--they're not going to dicker with you about it. And if you don't get anything boosted into space, you're not going anywhere.