When I took my friend in for his taxes last year, I learned that all the expenses of his memory care apartment, food, etc, were tax deductible, as were the Visiting Angels' expenses for his wife's care before they got into the AL/MC unit. Since their added up expenses were greater than their income, no tax obligation existed that year. If the tax preparer tells me the same thing this year, I will no longer have state and federal taxes withheld from his income. I am keeping good records still, though, to document those expenses.
If the services to be provided are "medically necessary" for your husband and you pay for them yourself, if you itemize deductions on your tax return you can factor those fees in. Make sure you keep meticulous records just in case of an audit.
It is best to check but if these things can not be handled by your husband or yourself (safely) they might be. I have my taxes done and I was able to deduct portions of Adult Day Care as well as some Respite care. I was also able to deduct a piece of equipment that I purchased.