I don't understand how your wife's needs are a factor. Either she separates the stuff for the clothesline before washing (ie individual loads), or before drying. And I can't see how separating stuff before or after a combined washer/dryer is any different than separating it before or after from a single washer.
With a combined unit, you don't *have* to use the dryer functionality. It is still possible to stop after the wash cycle. How is that then different to what she is currently using?

:confused: