I agree with a previous post that having a simplified chart of negative & positive symptoms that can be kept somewhere that is visible & easily accessible (such as on the fridge) can be beneficial, as can group family education sessions (if available). I work in a small community with limited resources as well, but we’ve found that we can access online groups outside of our catchment sometimes which can be used to support & educate the family. Working with the client on realistic goals & an activation plan (that the client feels is manageable) could also be helpful. Discussing the goals & activation plan with family afterwards can help bring awareness to the family about what their child feels they are capable of.
This is a tough situation, but it sounds like you are doing your best to help the client while educating the family.