This is the silliest idea I've ever heard in my life. A one-way Mars mission funded by reality-television dollars?
Now, if they instead went to a much closer place (i.e. the Moon), and DID have some means of returning to Earth if funding ran out, then it might be more feasible.
you need to bring everything with you to Mars including the return trip. The return trip is already bought and paid for when it gets there. Sending people on a one way trip to Mars is basically creating a hostage situation, the hostages are the people sent, and unless the public funds a resupply mission, they die!