sourdough in the breadmachine???

A friend of mine has an allergy and she has been baking her own irish soda loaves for a few months. She thinks though that using a breadmachine would save her time and is looking to buy one. She asked me for advice, on using sourdough in the breadmachine (which i would be providing). My first thoughts on this is that it is known to be hard to use sourdough ONLY (no yeast etc) in the breadmachine and that she would be better off doing quickbreads with baking soda.

What are YOUR experiences? I have no breadmachine and prefer to make dough by hand anyways.....