I've always wanted to do that. Course, I've always been broke. Our neighbors gave us one once, course, it was broke, but we somehow (I don't know, SOMEHOW) managed to fix it, to where we could zoom in on the moon.
There was this guy in our neighborhood who made an observatory, with this very fancy telescope. With a dome and everything, when he died, he gave the dome to Southwestern University IIRC.
Very cool driving by it and seeing it. I would love to see what it looks like inside.