I would like to add that she also had one sentinal node positive only and it was microscopic at that. All others negative. The deeper the mole the more likely vascular invasion which means it can spread through the blood stream. Her lung metastis developed through the blood stream and bypassed the lymph system. It will seed where the blood slows down enough for it to take hold. Interferon may help the immune system beat down any distant metastis but it does take a toll on a person.
It will be hard to go to work and remain energetic. The attempt may be worth it. Some oncologists feel the first month is the most beneficial and the other 11 have a dimished return on investment. It is still be debated but you may want to discuss this with your doctor. One month with the PICC line injections is tough but the 11 months self injections (while less harsh) wore Melinda down. Big men have been known to quit. Different for everyone.
This is a very serious disease and I would hope his employer would be more supportive. I guess that depends on the size of the business and their ability to help out.
I hope things work out for all of you.