Re: Won't happen for that price
The Dragon can carry 7, lets say 6 as passengers, and fuel cost for a Falcon 9 is $300,000. For airliners fuel is half the ticket price, so let's use that for fully reusable launch every day Falcon just like a jet airliner. Total launch cost is $600,000 or $100,000 per passenger.
Then you go to Mars on a different vehicle, something with more room and supplies, it drops you off at Mars, refuels, and comes back to be re-used. You would need at least 1300 pounds of food, clothes, personal effects, and other supplies per person for the trip. Total payload mass would be 1500x6people = 9000 pounds. Then you have the weight of the empty transit vehicle, lets say 30,000 pounds same as an empty Apollo CSM.
Then you need the fuel to boost 40,000 pounds to escape velocity, a delta V of 9800 ft/sec. Maximum oxygen/methane vacuum isp is about 330, at an average acceleration of 1g the engine would have to run for 304 seconds, or in other words you need almost 1 pound of fuel to accelerate 1 pound to escape velocity. Since the fuel is also being accelerated, 70.000 pounds of fuel will be needed to get 40,000 pounds of vehicle and payload off to Mars.
The 70,000 pounds of fuel, 8,000 pounds of supplies, and a container for them weighing lets say 7000 pounds need to be brought up from earth orbit, a total of 85,000 pounds. This would take three falcon launches, $1.8 million total or $300,000 per person. So we are up to $400,000 already without the cost of the Mars base, the Mars refueling equipment, and the transit vehicle, all of which needs to be brought up from Earth and transported to Mars. I would say total cost would be more like $1 million per person, which is still pretty cheap.
You can see the biggest expense is fuel for the transit vehicle, if instead it had a solar powered ion engine using reaction mass magnetically propelled off the Moon and Mars, then it could probably be done for $500,000 a person.