With rare exceptions this is a bad idea. Rough example...very fact dependent. Husband and wife own home outright..no liens...worth $100K. He's 69/she's 65. They could probably get a max lump sum in the $38-40K range. Upon death of the latter home would go to mortgagee. They'd still have to pay property taxes, insurance etc...if not there are ways for the RM company to get the house before they died.
PLEASE read every article in this link before you talk to them about it/let them do it. Rife with suprises and even fraud:
Reverse Mortgages, Reverse Mortgage Education Program, - AARP