Working on base?

So i recently started living with my sister and I'm trying to get a job. I want to get a job nearby where we live because i would have to walk. I am trying to get a job at the leasing office for her housing but she said what if they look into where I'm living because apparently the lease doesn't allow you to have a person living there for more than like 3 weeks. (Which i wasn't aware of)

Im stressing out because I'm not sure if they will look into where i live just because it's the leasing office I'm trying to work at. I have a pass to get through the checkpoint to go on base but do i require a work pass? Also would it be believable if i said something about coming on base everyday? Would they allow me to work here if i was living off base?

I really wasn't aware about any of this. I'm just worried because the nearest thing after that is a fast food place an hour walk away. Any advice?

I really don't know about any of this stuff.