Seems like most of the RE photographer I know of it's more a matter of the most photos for the least $$ is the name of the game.
I don't see how anyone can really do so much work in so little time to make even less. However, there a few out there that make good money with higher-end properties and charge accordingly. If that's the case, that's the way to go!
Most of the people who approached me through the years were clueless and wanted a moon shot for the price of a firecracker and most of the people I knew in real estate through the years have seldom offered little but peanuts for photos, though a few realized that this was key for better sales on selected (high-value) properties.
A few years back in my former life as the editor to my ASMP chapter's magazine, one of our members was both a licensed real estate professional and photographer and was doing quite well at the time. If you can find a good niche and can photograph like an architectural photographer but on steroids, you should be able to do well.