Grandma's heart

Grandma needs open heart surgery on the 19th of this month. She retired and live with me and my wife who already have so many bills to pay however of course we are putting in as much as we can. The total the hospital gave her with her insurance was 2,900$. Her heart is pumping blood but it’s not getting a lot of blood out back into it. She needs this surgery Or she wont make it another 2 years. Anything helps. She’s my best friend.