What is the maximum rent increase in Oregon State for Senior Independent Living Facilities? Was there an increase moratorium during COVID?

How can we negotiate rent increases?
Sign a Lease?
If we live here for many years, can we get a lower rent increase instead of increasing rates to market value?
Many landlords will do that.
Any other suggestions for this vulnerable population?

Is it ethical to pass on the Oregon CAT tax to seniors at an independent senior living facility? How can we negotiate that?