A working fusion reactor that is small enough would allow people to land on Mars

I do think we should use more off the shelf russian launced unmanned probes.

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Get corporations involved. Allow one seat in each mission to go to the choice of a corporation... be it the Chairperson, CEO, elite athlete for advertising, joyrider... add a price tag that is dependent on how useful the person would be to the mission $1 billion for deadweight down to $50 million to someone who can pull their own weight.

Allow a national lottery for a person to go up. Spend $10 and you too may go to the moon for 7 days... I can see a lot of money comming in from that... 50 million applicants, half a billion dollars.

Allow international cooperation.