$250k. Wow. I'd have to say you'd need multiple doctorates, you'd written at least one book that every programmer regards as "The" reference manual, and gotten a Nobel Prize for something. I've been writing software professionally since 1979 and I'm at not quite 3/4 of your goal. Maybe location and choice of tool set has something to do with it. Good luck.
I think you might want to reexamine the market. I'm several multiples more than $250k and have a BS and ~15 years of experience working in web development.
Please don't take it personally, but that's hard for me to swallow. I've probably got coffee mugs that are older than you from places where I've written code.
And thus does the clueless old man fade off into the sunset ....
