What Charlie is saying, and the other guy about, what you know keeps the doors from closing once you are in is the truth.
It may very well take months or years to find a few good accounts, but once you do you will be doing good.
I have changed from doing weddings to no weddings and all corporate and legal video. To it a completely different market segment I have become a “ditch digger,” actually mowing lawns and getting into landscaping, working to hiring a crew to work for me while I do my videos. I am making more money in the lawn mowing than I was as a pro video editor/camera op working for another company 40 miles from home.
The video market is starting to crack for me, but it has taken time. So you might have to divide and conquer so to speak just to survive.
Tim