Biking shoes

My kids were talking about how much people spend on shoes. Saying things like "I would never spend that much for a pair of shoes!" I didn't dare tell them how much my Specialized S-Works shoes cost. Anyway I have typically used my normal shoes when riding on the stationary bike. The problem is that the arch in my foot gets real sore after a workout. So I switched over to using my mountain bike shoes for my last training session. What a difference! The stiff soles fixed the problem. I guess I should dig out my old worn out mountain bike shoes for the indoor training. While they are beyond their useful life for real biking I think they will work well for the indoor stuff and maybe make my other biking shoes last longer.