Hire New Staff
We all know that it isn’t easy to find good people. Rarely do you hire someone and immediately they’re a superstar. You've got to carefully select a person who can do everything without too much oversight.
If you hire the wrong person, you have to fire them. Then you have to repeat the whole process. Depending on how many times you have to repeat that, it could take a while.
And it’s only one person. If that person gets sick, gets recruited to another company, gets depressed, any one of 100,000 things, well, you’re screwed. So you could also do number 3.