How can i get rid of mange on my cat without spending allot of money.?

our cat seems to be losing his hair and i believe it has something to do with the other male cat that has become friends with me. is there a stress related thing that could have something to do with losing his hair? how can you tell if its mange or something else?

can you HONESTLY put a price on the health and well being of your cat????? if your answer is yes, then please find somebody who will give this cat the care that it needs.