Sorry to get back to you so late...didn't see this until now.
I used to eat around 28-32 servings of carbs (almost entirely sugars and simple carbs) a day before I started SBD. I was the definition of a carb addict!
As to whether you can do SBD without dying...I refer you to Moderator Sandi's sig quote: "If you want it, you'll find a way. If you don't, you'll find an excuse." I know that helped me a lot...I really wanted it, this time. But what made the real difference was that my cravings went away! It was the most amazing thing that's happened in my whole life. I had never gone through a day without being hungry 24/7 and eating carbs all day long. It's amazing to me!
I think anyone who truly follows P1 and gets rid of their cravings can do this and without any pain, let alone death.
Like Barb said, lots of spouses aren't on the plan. My skinny-minny husband would have been dead by now if he'd stuck with my version!
He eats what I eat, though, God bless him
but he supplements it with other good carbs and more food. We can give you tons of other hints if you need them, but it's definitely possible to do this without your spouse on the same plan.
Hope you join us!