You have been focussing on this thing for a long long time. In your own words you think it's a long shot.

Now imagine you're an 3rd party investor. You have $200k "return", health benefits, vacation, savings in one year on the one hand and a startup with your size stake with your current idea on the other. Which one would u pick?

As a selfish investor which would u pick?

I don't know the terms of your deal but you should be able to sit down and make an apples to apple comparison.