You seem to be doing this part time. I've seen other people (Rich Dad, Poor Dad) giving similar advice about real estate investments for years, but my question

You seem to be doing this part time. I've seen other people (Rich Dad, Poor Dad) giving similar advice about real estate investments for years, but my question has always been: How is the market still that inefficient? I don't think you could do the same thing on stocks or bonds. Are there just a ton of localized laws and market quirks that keep the market from clearing?