I've never been to Ohio, but if there are chelation centers there, then Dr. Hickey can write out his protocol for the local chelation center to continue with.
I've done about twenty chelations over the last two years. I can't say it helped I'm sorry to say. But here's the way I look at it.
There are no markers for ALS. ALS is diagnosed by elimination (ie. "No, you don't have MS, polio, Parkinson's etc.). The cause of ALS is unknown. Ergo, and hopefully, your husband just may be suffering from Lyme, heavy metals, toxins, etc.
Why not try the chelation. Has your husband been tested for heavy metals? I don't mean a hair test...but a blood test challenged with a chelator? Has he been tested for Lyme...not by Quest or Lab Corp...but by Igenex?
My guess is that the special protocol for chelation that Dr. Hickey might follow is to use calcium EDTA for the first few sessions, retest for metals, then continue with some DMPS chelation. There are reasons for this method.
During chelation your husband will also likely get injections of glutathione, lucovourine, and vitamin B. These might have a favorable effect on him.
His choice to to do something...or to go home and do nothing.
Some on this forum may find what I say is credulous, but I am a skeptic. Be careful of cynics advising you.