I don't think Mars One will get $6 billion from commercials on a reality show. I'm sorry. Looking at the numbers I just don't. But they should get something between one and two billion (over ten years) because that's in the right ballpark for other such shows.
Yes, landing on mars will be like landing on the moon with even more eyes watching but humans have an amazing capacity to lose interest in the amazing. Then you've got what ever is left.
2500 kg to the surface of mars on SpaceX landers for $150m has been proposed by Elon. That's using an $85m FH launch and a wider $50m Dragon lander. So it certainly seems doable. So $60,000/kg for supplies to the surface of mars.
Any human mission to mars is going to require presupply. Both mine and Mars One's do. Let's marry the two!
Mars One sends the landers they already plan to send plus 4 more with food because we're sending 12 rather than 4 colonists on the first trip costing them a bit more than a billion dollars (which they certainly should be able to raise.) This gives them more crew and talent to perform their reality show making it more interesting and less work per person. We still only land 4 on the first landing but the others are waiting in orbit with two more landers. Those first four will not have to wait another two years for company.
We will pay the cost to transport the colonists and they will provide the tv commercials to promote the colony trust website where martian real estate will be sold.
Sounds like the very definition of synergy to me!