As I stated before elsewhere on this site, I use my drone about 40% of the time in my business to produce documentary style videos for government, tribal entities, businesses, and, private individuals. I do real estate videos, but it remains a small percentage of my total business. So, I may not qualify perfectly with your question wolfwill23 .
I have found that diversifying somewhat is helpful to me. I may make a video for a government entity and never use my UAV. Then the next time it is almost all drone work, depending on what my client is looking for. Real estate sucks. Everyone and his brother at these real estate offices have a drone or know someone who will fly for them …. for next to nothing. Go elsewhere.
You have to be better than your competition. I have mentioned on this site that to have a strong background in video editing is essential for creating awesome films for your clients. Networking is also essential. Nobody picks up the yellow pages for a drone operator in my experience. No. It is who you know. They gotta know you exist and are available.
Learning the basics about good business practices is essential for success of your new business. There is a lot of paperwork in business, including insurance, permits, state stuff (business license, etc.) you need to keep up on.
The last thing I would say …. and in a way the most important ….. you must be sold out to your business. If it is a half-assed attempt to try making money with a drone, you will most certainly fail. You gotta be all in! Live, eat, and sleep your business and the chances are you might succeed. But your chances increase the more time you spend making your business the center of your attention.
Just my humble opinions.