What kind of help is there for a conservator?

My brother is mom's conservator and she is giving him a hard time. She has dementia. Besides reading the booklet the state offers, what can he do to deal with this responsibility? I completely trust him and I think she does too, but she doesn't want a conservator at all. The court said she needed one and she chose him. Now he has to deal with her abuse, as do I as the guardian. For me it is going better, but her money is a hot button issue. We are all going to seek help dealing with this by going to Alzheimer's meetings. What else should we do?