Legal Question in Real Estate Law in California

Unemployment possibly, and adequate notice before you have to move. That's about it.

if you did not have a contract of employment specifying that you would remain as manager beyond the date you were let go, then you are an at will employee and can be fired at any time. As Mr. McCormick points out, if you are at will then your only rights are as a tenant so if it is a month to month tenancy then yo are entitled to 30 days written notice, 60 days if you lived there a year or more

A resident manager is an employee, not a tenant, and there is no statutory entitlement to notice. (This might be different in certain rent-control jurisdictions). Unless the employment agreement provides a notice period, you become subject to an immediate unlawful detainer action the moment your employment is terminated. (Mr. Shers is wrong unless he is addressing a specific rent-control jurisdiction that specifically protects ex-employees as "tenants at sufferance."