Quantity   Component name
1 × Nixie Clock, with serial port I had one on-hand, made by Sparkletube, via www.kosbo.com
1 × NodeMCU dev board I had one on-hand; mine is an ancient 0.9 version (aka 'V1'). But I'm sure the later oness will work, too.
1 × Level Shifter I had on-hand a SparkFun level shifter board. Mine is discontinued, though many others exist -- it's a pretty straightforward design. Plus, I'm not convinced you strictly need this at all, but I'm just paranoid. And using parts I have on-hand is /sort of/ like cleaning the garage; no?
1 × Ball of Kynar wire 'wire wrap' -- whatever! we only have solder here...
1 × 3M double-sided foam tape deliscious!
1 × Sense of Humour if you can't laugh at yourself, who can you laugh at?