Hello I definitely know how it feels to have a bad toothache. Have you thought about getting a second opinion? Reason I say that is, I have gotten 3 opinions from 3 dif dentists before. I went with the third because he found not as many problems as the other dentists( I know they were exaggerating it's sad) and he cost less. The work he did on my teeth was great. Also if his teeth are that bad maybe instead of all the root canals and crowns it would be better and cheaper to get them all pulled and go for false teeth. Maybe save the ones that just need fillings and get a partial for the ones that need to be pulled. Also, you should check into your county hospital or dental schools in the area, they can often help for much cheaper. Good luck!