When you're brand new, it's really hard to sort through all the details. After a year in the business, you'll have a much better idea of what you want. At this point, you may not even know yourself what will make you happy. Some discount firms DO offer full service and yes, in some markets, the business truly does come to you. (I am currently mentoring a client in Colorado who works for one of these). Some companies offer lots of training, although I've found that often the training is pretty sketchy and scattered.
My best advice? Interview around... find a place that "feels" right to you. You'll know when a company is a bad fit for you and you'll know when a place feels good. Your initial relationship with your broker will be important, so if you have a great rapport with the managing broker, that might be a good spot for you. Don't work for a Re/Max or other desk-fee company starting out - you WANT your company to have an interest in your production so they'll be willing to help you out.
On the other hand, real estate is an individual sport. Your success will not depend on the company you choose; it will depend on you. And if you pick the wrong office at first, it's no big deal to switch, so don't incur too much brain damage - just go to work!
Good luck!
Jennifer
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Jennifer Allan, GRI
RE/MAX Hall of Fame
Author of
Sell with Soul, Creating an Extraordinary Career in Real Estate without Losing Your Friends, Your Principles or Your Self-Respect