Granny, I wish we lived closer. I'm so sorry you are suffering through so much.
I learned recently that a local Amish man passed away. Probably in his late 70s or early 80s. He had a stroke a couple years back but got an infection/sepsis. Became wheelchair and then bedfast. Developed cavernous pressure ulcers that the family didn't know how to take care of. I was heartsick hearing how bad they were and knowing that I was only a mile and a half away and if they had asked I sure would have showed them how to turn and position him and treat the ulcers.
I agree with the advice Cynthia12 gave you about getting Tom to move around. If you have a soft pillow or cushion that you can put under his bum in the wheelchair that will work too. If he is in bed make sure his heels are off the mattress. Put a pillow under them and see if you can get the doc to write you a prescription for heel protectors. Medicare should pay for them. If he is on his side, support his back with more pillows so he can't roll and put another pillow between his knees. I know this is a lot of work but it will be worth it. Also try to turn him or get him to move around once an hour and make sure the padding moves with him.
Something off the usual treatment. Bag balm. If you can get some, rub his heels, hips, elbows, shoulder blades and where his butt meets where he is sitting. It will help toughen up that skin.
If you have any questions, I am here. Just ask. I did this professionally. Never had a patient with decubiti ulcers/aka bed sores.