Its incredibly hard to make a prediction of the growth of technology, and therefore our capabilities in the near future. So, although Elon Musk's predictions might seem a little far fetched, and don't get me wrong they are. I think it certainly might be possible in the lifetime of a few users on this forum. Obviously, Elon is a businessman, and he knows how to make money. He knows that going on Joe Rogans podcast was a good move, and he knows exactly what to say to increase his sales. However, Elon does have a good track record of delivering what hes said he will do. Although, its usually a little longer than the initial prediction.
Technology is moving at a rapid rate these days, just today I read that Elon is might be ready to start human trials on his Neuralink project, and another story about a battery made of nuclear waste that won't need recharging for 28,000 years. If the first is true, then we can all go to Mars, Total Recall style. If the second is true, the implications of a limitless power supply are only bound by imagination. Of course these fantastical projects are usually decades from becoming reality, having any practical application, or being affordable enough to become commonplace.
Space travel will get there in the years to come. Whether it's affordable for the average joe or not, it will become affordable enough for businesses to take advantage of the opportunities. It's already getting cheaper as multiple countries and private enterprises are competing for contracts.
What ever happened to that proposed reality TV program that was promising to send a crew to Mars (one way) with the landing / viewing as pay per view?
Are you referring to Mars One? I heard it went bankrupt, it was probably a scam from the start. There have been several Mars colony simulations, but I don't know of any that were featured as a reality show.