I actually attended a bootcamp for 1 week, but thought it was over priced and didn't provide much instruction (25 students, 2 instructors, sometimes only 1 instructor. After a lecture on a topic, I'd spend 95% of the day just googling stuff. Also, the lessons were not structured in a pedagogical way in my experience there. That said, it was just after bootcamps became a thing-- I was one of the first cohorts at the one I attended).

So, I dropped out after the first week and was refunded remaining tuition. I went back to the workforce and learned dev part-time.

Bootcamps seem to be about 12 weeks (that's 3 months) plus about $12,000 or so. Whereas I took 4 months & paid zero. But that said, I already knew how to program when I started my project.

The project was more about showing strangers that I had the skills I claimed to have.