Beautiful idea.
Check out Richard Avedon's "In the American West" for an idea on what to do background wise. It's an absolutely beautiful series of portraits of everyday joes like yours but without the dream job thing.
avedon american west - Google Images
His background is just plain white. I imagine (because that is why I would do it that way too) that it is to bring 100% of the viewer's attention to the subject. No distraction whatsoever.
I believe your series could benefit from a similar background. Also try and keep the lighting fairly constant throughout the series.
Good luck with this project and hope to see way more in the future.