Mary, It really isn’t any of my business or the boards about your Mom’s “needs”, but I ask because it is an element of strategic planning. Since you know the answer to this then you proceed as you are to learn who are the potential suitors for you to shop your mineral rights to.
I understand this parental component. My Dad and I met with a landman while he was terminal with cancer. His thinking was to put a deal together that he would leave behind to his children - the children actually decided against leasing at the time because we were concentrating on his healthcare and just having quality time with him at the end. So we declined the lease offer that was given to us.
Some time later, after Dad had passed, we found out that the gas/oil company had gone out of business. hmmm…
So anyway, consideration of the “bigger picture” is important and it appears you and your Mom have that understanding. Good luck on your search and enjoy the process with your Mom.
Wilson