Astronomy

Does anyone have any experience home brewing a radio telescope? I'd really like to make one myself, both because it seems fun and challenging, and because it would probably be cheaper than buying one of there are any consumer grade radio scopes. I'm aware of some tutorials online, and one concern that I have is that many of them are intended to output data to software. I'd like to convert the signal into something audible, so that people can actually hear the emissions. The three targets I have in mind are: the sun, Jupiter (like the JOVE project), and hydrogen emission frequencies from nebulae. Ultimately, my goal is public outreach and education rather than amateur research.

I have next to no experience working with radio anything except old AM/FM receivers and walkies. I also know next to nothing about how radio telescopes work, so if you have a particularly good resource besides googling it, I'd be greatly obliged. My questions are: did you find building/using the telescope difficult or expensive? Did you find that it was worthwhile / would you do it again? And what advice do you have for someone looking at it for public outreach?