One of my books on Amazon is all about getting over obesity excuses. Trust me - I had many excuses before I turned my life around. I have Chapter One of my books for free over there. Maybe it might help him to read the first chapter of the obesity book.
I mostly help people to start working out in their homes. Going to the gym when you are not at your best is not an easy step to take. It's very easy to say you are too tired or don't have gas money, or any other excuse not to go. But you can do a lot in the privacy of your own home and it can be very effective. I hear you on the lame excuse thoughts, but when you are obese, it is very hard to get over it.