I did the math & for what I need it's cheaper to make my own [potting soil mix], not by much tho. A big part is that I have so much compost.
Thanks. I have lots of chicken run compost, but like I said, it is full of active life and I don't think I want to use any of that compost inside the house.

It might be cheaper to buy commercial sterile potting soil mix when on sale. It certainly would be easier. And, in reality, it's only for seed starting in the house that I even use any potting mix.