I saw your question and was moved by your situation. It certainly sounds like your husband has been poisoned by too much exposure to brass. I am not a doctor of any kind but I have suffered with heavy metal poisoning myself and Id like to offer some suggestions. I used French Green Clay, Selenium (Methylselenocysteine), N-Acetyl Cysteine (NAC), and a great Green Drink to help move me away from a completely incapacitated state. Your husband seems to be doing a good job of detoxing through his sweat so I suggest you encourage it with hard exercise (if he's able), saunas or steam baths (if available), or long hot showers. Your husband should also eliminate toxins wherever possible so his body can begin clearing the heavy dose of brass. In other words, eliminate all fake and processed foods (like fast foods and non-organic packaged foods), artificial sweeteners, preservatives and colorings. Buy organic food, and buy or filter your water. Also, avoid chemicals used in hobbies like lawn care, painting, house cleaning, etc. Needless to say, your husband needs a new job. Take his disability, if he has any, and begin treating him now so his symptoms dont progress (it can get MUCH worse, sorry to say).
Here's some information on the supplements I suggested. You can do more research online.
1) The Sweet Poison website says, "In 1986 after the meltdown of the Soviet nuclear power plant, Chernobyl, the Soviet Union put French Green Clay in chocolate bars and dispensed them freely to the masses to remove radiation they may have been exposed to. Found only in France and India, the ancient sea beds that provide the green clays have healing qualities that not only attach themselves to and remove toxic foreign substances within the body, but activate the body's own immune system through its chemical constitution. French green clay has the ability to remove toxic metals and chemical residues, bacteria, and blood toxins with virtually no side effects of constipation, diarrhea, or stomach cramping. It is known to remove radiation, arsenic, lead, mercury, and aluminum amid other toxic metals in less than six weeks. The more you use, the quicker you detox." This works great but its very hard to find. I get it at hullisticmarket.
2) NAC is protective against nuclear radiation. I've read that it helps to escort heavy metals out of the system. It's also a Sulfur-containing nutrients that is critical in detoxification and protecting cells.
3) Selenium reduces toxic mercury that accumulates in the kidneys and may help with other metals too. Many people - especially the English - are very deficient. I prefer Methylselenocysteine because it is the kind of selenium found in food (not rocks) and is easily absorbed.
4) Chlorophyll absorbs toxic heavy metals like mercury. Today there are some fantastic green drinks available that will really change your health for the better. Most of them taste terrible. After years of searching Ive finally found one that has tremendous health effects and tastes great. Its called Paradise Herbs ORAC-Energy Greens. Green drinks are rated by how many free radicals they destroy - it's called the ORAC rating. Most really good green drinks have an ORAC of 2000. The green drink I'm suggesting for you has an ORAC of 12,000! It seems expensive but you only need 1 tablespoon per day and it helps to compensate for many dietary mistakes. You can find it at iHerb in 3 sizes.
Finally, pray - a lot - and ask Jesus to reveal to you the healing He has already won for us all. I mention this because I think it was vital to my own recovery.
MDs in the US dont understand this type of illness yet and few will be able to treat it. Keep looking but don't let them experiment too much. Research everything online BEFORE proceeding. Also, please limit the number of lymph node biopsies you allow. The lymph system works as a whole and is seriously encumbered when parts are removed. The lymph system is VITAL to your husband's recovery because its main job is to remove toxins. Exercise (including walking or just moving your limbs when bedridden), massage, and skin exfoliation with a wash cloth or mitt will help the lymph system work more effectively. Naturopaths are often too invasive as well; suggesting chelation (dialysis-like treatments that remove all metals and minerals from the body and can cause severe illness itself), harsh dieting, or even harsher fasting (which can push toxins into the bloodstream too quickly and cause damage to organs - like the brain). You dont want these kinds of setbacks so always start with the LEAST invasive treatment that might be effective.
I hope you can benefit from my long and difficult struggle. God Bless You both.