Advice on training my (rather large) father.

Basically, I'm home fr the winter break right now and my dad has shown some interest in lifting, which I started a few months back. Wondering if you could give me any advice with how to adapt programs to his particular needs.

He is, to put it bluntly, massively overweight, about 6ft, mid 50s and built like a bear thats had too much honey. He is also diabetic and has an inner ear problem that means his balance is pretty poor. I don't think he's done any proper exercise since childhood.

I'm planning to teach him the basic Starting Strength lifts, probably not cardio at the moment as we both find it dull, (he does like swimming though) and try and get him to starting tracking his calories and improve his diet. Its going to be a big task so any help is greatly appeciated.