Help my husband to go see a brain specialist.

My husband Larry has been fighting this nasty disease Cancer. He has survived Lung Cancer now it move to the Brain he has 3 tumors he is on amino thereapy which are just containg the tumors. He is see alot of spots in his eyes so they want him to see a brain specialist in Kennesaw to hopefully get some anwsers.we would appreciate any help we can get. Medicare doesn't cover a whole lot. Please any help will be so appreciated. Love to all.