My wife needs surgery on her foot

My wife, Marisa, is 60 yrs old and works as a caregiver. She has a huge bunion on her right foot that needs surgery. It is extremely painful when she works. She has insurance, but they still say we must pay $70,000 out of pocket. I am retired and have severe emphysema. I receve Social Security and a small amt from a trust.  We live frugally and have a hard time paying bills, but we are happy. Marisa provides us with the extra income we need to get by. Without the operation she will not be able to continue her work as a caregiver and we will not be able to meet our bills.  We would truly appreciate any help we can get. If we can get help, Marisa can work to help support us and make it to retirement.  I have never asked for anything, but I'm asking now for help. Thank you.