What was the biggest problem that thomas edison faces by making the motion picture?

In his lifetime, Edison made 1,093 inventions. Among other things, he made the first light bulb. He created the first means of electric light, heat, and power. He made the first motion picture (movie). He also made the first phonograph. It was the first kind of machine to play music. He created a voting machine and a stock ticker, too. A stock ticker prints stock prices on paper tape

It was hard for Thomas Edison To make the motion picture because back in the day they didn't have all the tool for fancy projectors and motion pictures.

If I find 10,000 ways something won’t work, I haven’t failed. I am not discouraged, because every wrong attempt discarded is another step forward. – Thomas Edison