Well, no, I don't have to do the entire basement wall. We plan to later finish the basement, so it wouldn't hurt to go ahead and insulate the whole wall. I am thinking I may be better off with a rigid foam board on the walls for now though. They make some that can be left exposed...
We won't have an insulation contractor on site except for the basement. The rest of the house will be constructed with sips.
Thanks for the recommendation, I will check them out.