My wife's five siblings had to go through that. Took two years but fortunately they are from a very, very small town in Iowa so court costs were almost non existent and the lawyer was a family friend. The brother who had power of attorney while mom was in the nursing home stole $$$$, then wanted his full cut and held everything up until the siblings finally agreed.
To all you make sure everything is accounted for and have accountability partners set up before anyone has power of attorney.
Mikey