can a person serve two masters

i am a witness of jesus and i witness to people for jesus in hopes of doing good works. and bringing others to christ.

i also work as a cashier
i have worked as a janitor
i have worked as a security guard
and temporary laborer on odd jobs and on call.

so if your question is about being a cashier, the answer is yes.
however, a true disciple, which is defined by the new testament, says a person "denies" self and takes up his cross. Jesus also said to a few people to sell all they have and count the cost.
everything i own fits in my car. and pretty soon i might not even own the car or this computer.

my uncle frowns on current literal interpretation of the above verses, the LDS church has a "lay" ministry where people are priests but they are also families, despite the teachings of joseph smith parable of the cook and the butcher.

the bible does say a person cannot serve two masters at the same time. but there are part time missions in the church as well.
the bible also denies false prophets who prophecy for money.

so go figure. which one do you want to do.