I am looking at buying a telescope that I can mount to my son's playhouse, and leave it outside year around. We live in the midwest, so there is weather. I wa

I am looking at buying a telescope that I can mount to my son's playhouse, and leave it outside year around. We live in the midwest, so there is weather. I was thinking of something like the coin operated ones that you see at tourist spots. They are pretty expensive. Anyone have any info or done something like this before?