What’s everyone’s opinion on a subtenant?

[Aaron Macpherson]

I have a potential tenant that will sign a year lease. But she would like to help cover rent cost by having a roommate. I’m okay with her having a roommate. But the potential roommate does not want to sign a year lease, because he does not know how long he will be living in the area, do to his job. He would like to be on a month to month rental agreement. I have an idea to have the potential roommate sign a sub lease and the permanent lease holder sIgn aswell. IS THIS A BAD IDEA or not? What’s everyones thInk?