<p>You need to expand your vision of what real estate is. Real Estate isn't just homes and condos. It's also retail centers, office buildings, hospitals, universities, apartment complexes, mixed use developments, industrial parks, land, retirement centers, etc etc etc.</p>
<p>Most residential agents do not make that much money. Also, keep in mind that the barriers to entry are very limited for residential real estate. You just have to be 18+, spend a little money, pass an exam, and that's it. This is a negative because the number of potential competitors is high. Also, you must compete with part-time agents as well as limited-service real estate offices that take lower commissions.</p>
<p>On average there is much more money to be made in commercial real estate. If you think one can make a lot of money selling a house, think how much money one can make by brokering a deal for a shopping mall, a casino, or a skyscraper.</p>
<p>If you are interested in commerical real estate, whether it be as a developer, broker, financier, investor, property manager, acquisition associate, etc then I recommend you get a degree in finance or real estate finance. It is possible that you may need an MBA at some point also.</p>
<p>That being said, there are people, some of which are highly educated, that make a lot of money as residential real estate agents. The keys to success involve being a good salesman and having a good market strategy. Most of the top agents specialize in representing the seller. Some specialize in representing the buyer though. Some make their money by doing a few big transactions (ie the guys you mentioned), and other make their money by doing a ton of smaller transactions.</p>
<p>Marketing would probably be the most useful major to be a residential agent. Finance would be better for commercial. If you weren't sure what you want to do exactly, I would go with finance.</p>