One thing you might tell him about single use items. When something is made to do one thing and one thing only, it usually does it really, really well. Kind of like my 301a. It only does straight stitch, but it does a really nice straight stitch. Personally, I prefer some single use items just for this reason. Sewing machines (not unlike other things made to do several things) often do them fairly well, but not really well
PS. I learned that from my DH originally and found that he's right.