Can we charge rent if my sister in law with Alzheimer's moves in with us?

Yes you can. You can also "charge" her for any time you spend on her behalf with legal matters, appointments etc. I would hope that you would be reasonable with this discretionary spending! you need to keep records of dates, times, amount of time and amount of payments for rent etc. The court may need you to submit them to show you are utilizing the funds for appropriate matters. I would google guardianship in your state for more information.

I've read all your previous posts. In March you were not inclined to have her move in with you, now you are considering it I gather? Her children and your mother in law are not contesting your conservatorship. I know your attorney will know the answer about charging rent and care taking cost. You probably can if she has the money for it but your attorney will know whether you can just do it and report it as an expense to the court in your annual statement or whether you must ask the court first for permission. Either way, I believe you will be able to recoup some reasonable payment. The key would be that your sister in law has her own money that you can access. The government doesn't pay much is anything for home care.

wish I had an answer for you but since she is not able to sign a rental agreement because of the alzheimer's I am not sure, I would call an elder care attorney and find out, best wishes