Well, to be technical, realtor does NOT mean real estate agent, all reators are agents but NOT all agents are realtors.
Realtor is a subset of agents that agree to certain rules and subscriptions and ethics codes AND mulitple listing services, etc.
Agents (which are changing in NC to all agent/brokers), are actually a pretty diverse group of work, some actually work with mortgages, property management, commericial and personal property management/sales, etc.
I think what you are asking is, "can I make money" selling real estate on the side...my answer is, it depends:
Are you REALLY asking, I am thinking about buying/selling houses/real estate. If so...don't bother getting your license, it will actually limit you to all sorts of ethics issues etc and nothing stops non-agents from buying/selling/flipping, etc property. YES...there is some decent money in this and THUS YES, there is LOTS of risk in this. As with all things in life, risk = reward
If you are just asking about being a part time real estate agent for a firm...the big boys don't want part time agents, so chances are you are talking about a small firm and they really have no incentive to help you either.... So...unless you really want a CAREER..., not sure it is worth the time unless you are serious about it.
I went and took the classes and passed, but never bothered to take the exam because I figured out by then I did not need it to do what I wanted to do in real estate! (buy/sell/rent houses)
Sam