Welcome to the forums, Brenda.
If your husband has had diabetes for five years and his health has continued to degrade (based on the complications you listed), it's not too late to attempt to reverse some of those conditions. Is your husband on insulin yet? If not, he should seriously discuss this option with his physician for one simple reason: insulin works! Oral meds may be sufficient for many but are too interdependent on other factors (such as diet and exercise) that may not be within your husband's ability to control adequately under present conditions.
If he is already on insulin, then he needs to get an in-depth education on how to balance his carb intake with the number of units injected. Too many uncontrolled patients using insulin often just inject a fixed amount of insulin without regard to their meter readings or the types/amounts of food consumed. However, to gain control over this potentially deadly disease, patients need to keep carb intake and insulin dosage in delicate balance in order to avoid hypoglycemic episodes while at the same time maintaining their blood glucose levels under 100.
In this day and age, there is no reason why anyone afflicted with diabetes can't achieve better control over this disease. In many cases, there are only three things that prevent that from happening: limited financial resources, ignorance and the fear of the needle (insulin). In the first case, tight finances can often be offset by making liberal use of online resources, public clinics, food banks, and other options available in most communities at reduced cost or for free. Ignorance can easily be overcome by educating oneself via online resources, public libraries, support forums, and purchased and/or borrowed books that are not available at the library. Self-education should automatically overcome the third and last obstacle with regard to fear of the needle because insulin use should be viewed as a life-saving option and not as something to fear or dread. However, it is something that is best discussed with his doctor because his complications indicate that he is among those diabetics who are considered as uncontrolled.