Actually, I think it is quite possible that we don't have the tech to do it, even with almost unlimited funding. I think the big issues are physiology, psychology, and weight. The big difference from the Moon is the time it takes to get to Mars-- about 8 months if I recall correctly. Then you have to wait there until the right launch window, and then come home. All told, you are talking almost 2 years in space. Even Columbus didn't take that long to reach the New World, and he barely made it, despite being on Earth. If you want humans there, you need a lot of weight, especially if you are not going to send someone alone (which is pretty hard to imagine given the psychological issues). You come in much faster than when you reach the Moon, so you need a lot of fuel to slow down. Worse, you need to be able to take off again through Mars' gravity. I don't know if NASA even has a concept for landing something on a rough surface that carries enough explosive fuel to take off again later. Then there's the physiological problems of being in zero or low gravity for 2 years. Even carrying enough food and water for 2 years is a big problem. You probably don't have the luxury of sending animals first, because you can't keep them alive for 2 years in space without people around, so the first humans are nothing less than guinea pigs (I'm sure there would be no shortage of volunteers though). In my opinion, even with unlimited financing, the effort would essentially be murder, like the first efforts to fly from New York to Paris. And although there were many who tried before Lindbergh, the big difference for Mars is that we can't keep sending more after the first few die-- we basically have to get it right the first time or the PR coup turns into a PR disaster.

Realistically, I think the only way it might be possible is if it is planned to be a one-way trip. We would need a terminally ill person who nevertheless is in stable health for up to a year, who would be willing to undergo assisted suicide on the surface of Mars. It seems like a crazy idea, and I have a hard time seeing NASA actually doing that, but any country that pulls it off will be the envy of the rest. Then you would not need to carry as much fuel, and an accidental death would not be viewed as seriously if the person were planning to die anyway. It's the only way I see it happening even within the next 100 years.