MIDIbox is completely new to me. What would be a good guide for a basic synth setup, and what would it cost me to build (roughly) for the part and such? I was looking at a few of the SID bassline videos on YouTube and I figured if I could build something half as good, it’d be worth my time.
Your best start would be ucapps.de and read the sid stuff. Then read the wiki and then the forums.
Welcome aboard python. Once you’ve had a good search around like the guys suggested, you may have some specific questions, and we’ll help you out with those - just make a thread and let us know 
Be aware though - midibox is a DIY project, so you are expected to do it yourself. Posting a question before searching for the answers yourself, will usually attract an unpleasant response 
Thanks guys. I realize this is gonna be pretty difficult to build, but it’ll give me something to do as a hobby, and hopefully once I’m done, something to be proud of.
I’ll read up on how to build this, and if I have any questions I’ll be sure to post.
Thanks again.
I’ll read up on how to build this, and if I have any questions I’ll be sure to post.
better first use the search function of the forum and then post
many questions have been asked more than one time. just search and see if your question has been answered already in a former thread
But you’re an the right track.
have fun!
matthias