I wonder if he has pneumonia. Has he had a check x-ray? That would explain the difficulty breathing. CHF would explain the low oxygen levels and the need for oxygen as well. For whatever reason it doesn't sound good. A human can go weeks without food and it takes very little food to sustain life. Hydration is more important but I am sure they are pushing fluids as much as possible. Yes a hospital bed will make it easier for them to help his fluid intake. Pressure sore mattresses are important if he is going to be in bed to maintain skin in integrity. It only takes a short time to, sometimes hours, to create a pressure sore... and it takes weeks to heal it.
If he is slightly dehydrated and not urinating as frequently that may be the reason for the smell. Concentrated Urine has a horrible odor. Being indoors, the outside temperature is irrelevant to body odors. It could be that they are not able to adequately bath him in his current state. I am sure right now they are more concerned with his health concerns that odors.
I am glad your husband finally signed the orders for no tubes
I am pleased that he did eat a little this morning.... and hope he continues to get better.