Just a suggestion - that both you and your mom check out the first three posts in this thread: http://petoftheday.com/talk/showthread.php?t=137249
The cook and boss may be sick and toxic people - and the longer you and your mom stay there, the sicker you will get too. It's a form of enabling...
What is your mental health worth?
Sit down and make a plan B. Maybe you could move in with your mom for a while to ease rent expenses.
RUN, don't walk, out of there!
Then, if it ever DOES sell, you can see about going back - unless you are totally happy at the new place!
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