Long time no see, studio peeps
efficacy, that's a real cool idea with the quasi-mashup, I like it a lot. Also really good production value. You mind if I share it with a few friends? One friend of mine is a drummer that does tons of video work with DCI and WGI lines (adamlikestofilm on youtube, check out his lot vids def). Other guy is a snare dude for Blast and I think he'd definitely dig it.
For those timpani, $200 is an absolute steal. Craigslist, really? Is that a 29", 26" and 23"?
I bought some used steel pans (a lead and a set of double seconds) out of public school surplus a number of years ago (~2005). Had to spend good money to get them tuned, but the drums themselves were sold to me for $100 for the set, which obv made my day.
When you say "cheap marimba/vibe," can you expand a bit? Might be able to help put you in touch with someone if you're serious.