I have a few rain coats. Two that are less than $100 are the Marmot PreCip and a ECWCS gore-tex hooded shell. Both are excellent coats for most uses and the military model is probably both cheaper and tougher than the Marmot. I have a gore-tex military coat in woodland camo that is ten years or more old and works very well. You can get them online inexpensively, say from $35 to $80 most of the time.