Need Will or Trust

There are attorneys on here would would review those documents. You may want to post this in the area where attorneys respond to your project post.

You don't necessarily need a POA to move him to another state if he is agreeing to move. But at some point you'll need a POA (if he has the capacity to sign one) or to become his guardian.

You can create your own power of attorney so long as it meets all the necessary requirements.

You basically just answered your question. You should review and update your will whenever a major life event happens that might influence how your assets are distributed in the will. The rule of thumb is the addition or subtraction of a family member, or addition, or subtraction of a major asset like a home purchase.

I'm not a fan of either term as I find they just confuse things. Durable usually is referring that it remains effective after incapacity. Sometimes general is looked at as terminating at becoming incapacitated. Another term which comes up is springing which this one makes more sense where it isn't effective immediately but upon a date or occurrence (usually someone being deemed incapacitated). I don't think I'd ever create a POA where it terminates at incapacity since that's when I'd need it to work. Now you say your mother has dementia. Will she understand what she is signing and the purpose of the document? If not, she doesn't have the required mental capacity to establish a POA and will have to have a guardian appointed by the court.