I have a similar problem (pump motor gets regularly drenched in the rain). Mine is on a pad but we get lots of heavy rain here in FL. I was considering doing the exact same thing with the "doghouse". I was thinking it might present a problem for cooling/airflow, though. I had considered one of those solar fans for the roof of a house. The problem with that is the combined cost makes me doubt the economics of doing that vs buying a new pump every few years. Hopefully someone else can weigh in on the merits of the idea.