Monastery janitor sounds cool, depending on the monastery. I wouldn't want to be in charge of sweeping all the floors at Sera!
Part of the reason I decided to learn Tibetan was to have a skill to offer to dharma centres. Because the unfortunate reality is there are few who are interested in continuously supporting someone's practice and/or study, especially in the West where such a proposition in expensive.
I try to never see translation as a "career" however, more as a service by which to repay the kind support I receive from the laypeople. And as a service to my kind teachers.
At the same time, if one needs to have a "career", one is fortunate if it has something to do with dharma rather than working for, for example, a mining company.
A foolish man proclaims his qualifications,
A wise man keeps them secret within.
A straw floats on the surface of water,
But a precious gem placed upon it sinks to the depths