For decades we have actual proof of people building airplanes in tiny homes with O/A so I’m not sure who said that but that’s simply not true. After you’re done welding then wait around for 30 minutes until everything cools and use that 30 minutes cleaning the shop and preparing for the next work session.
That’s just a excuse. People get what they want if they really want it. I’m currently working with someone in the Middle East who’s using 1920’s tools to build a airplane in a lean-to shed him and his neighbors built from garbage. Just start. Don’t think so much, if you want it you’ll figure it out.