[The door underneath the stairs is just a supply closet, as you were told! Nothing too wild here, but there are plenty of supplies for cleaning. You can find:
-A broom
-A bucket
-Soap and window cleaner
-A hose(you can get water to fill the bucket here)
-A vacuum
-Feather dusters(very important for a good maid)
-Rags and sponges
-A leaf blower
-A roomba
-A step ladder
-Whatever other cleaning garbage you can think of that I didn’t list here specifically.

You can take whatever you want! Or nothing at all! I’m not your dad, live your best life. Also will you REALLY get paid???]