Before I got waders, I just trekked through the water in my shorts and cheap pair of shows. Until I can justify $200-$500 to my wife on fishing gear, I'll stick to my CT $35 clearance neoprene boots, and $70 waders.
At the end of the day it's just water!
happy wife; happy life
my old Red Balls (PVC/nylon)did the trick for me, for many years. the key to comfort was a decent layering, and staying away from cotton.