I guess there would clearly be some people who would be much more likely to be successful than others. I can’t imagine it’s a good idea in our current situation

I guess there would clearly be some people who would be much more likely to be successful than others. I can’t imagine it’s a good idea in our current situation, in which there are very effective vaccines that have gone through extensive testing that will soon be readily available. Several of the vaccine candidates from a year ago have failed. So even pros with virtually unlimited budgets fail a decent amount of the time. Perhaps there’s a case where someone for whatever reason will not be able to buy a safe vaccine soon, is at real risk of contracting covid, is demographically at high risk from covid, and has enough knowledge and access to proper materials to make their own, and for that person it is a smart move. I don’t know. Anything is possible. I’m also defining bad idea as worse than the alternatives. It’s like riding a motorcycle. I consider that a bad idea because you have a much, much higher chance of dying than in a car. But your most likely result is neutral. Most people who try to make a vaccine will probably just lose a little money and time. And I should note I do things that are bad ideas sometimes too. If you’re doing it for fun or education or whatever else that’s fine, you should just be realistic about the risk you are incurring.