Filament Issues, Toxic Fumes, Which Beginner Printer? and MORE!!!

This Episodes Questions:

Hello!
I'm new to the 3d printing world (one week) and have enjoyed learning from your podcast.
How do you recommend diagnosing and fixing printing issues with different filaments?
So far Ive only run PLA and PLA+ through the Bambu x1C - I've got some TPU, Silk and ABS coming so it'd be good to be prepared for when someting eventually goes wrong! Norman

I recently decided that I needed more printers, as one does, and building one was fun, so of course I need a Voron 2.4 350mm. Now, I *could* just use the Print-it-Forward and buy the pieces, but I wanted to print it myself. I built the frame, added the panels, and by moving the MK4 screen a bit, I managed to use the Voron-frame to enclose my MK4 so it could print ABS better. I don't have the greatest ventilation available, but there is some, and I don't notice very much smell. Is modern, quality ABS a bit better health-wise, or is it still kinda bad? I don't sleep in the same room Christian

My son, age 13, wants to buy a printer. His budget is $350 MAX. We have been doing lots of research in this budget range via YouTube, podcast and talking to people.
We have been leaning towards the Ender 3 ke or the A1 mini, since the Prusa is just too far out of our budget right now.
The usage would be for masks, small to medium size mechanical parts designing, mechanic tool box organization, speed is NOT priority (but nice to have), print quality is preferred.
I want to know, now that some of these printers have been on the market for a little while, what would you recommend for a first time buyer today, considering the whole market and not just these two mentioned.
Thank you David