Is there any urgency to this request? It doesn't sound that way, but I may be misreading your OP.
Take the weekend, find your Happy Place, and think about the sky, wind, trees, friends & family, pets, read that book you've been wanting to dive into... get your head OUT of dealing with this issue for a while. "Whatever gets you through your life" (as John Lennon wisely said).
If the 75 mile commute is a downside - what things could you do to make this into a positive? Podcasts/books-on-CD from the library? What is your IDEAL job situation. Think about that, and make a list. THEN... take that list, and add things from that list into your current gig, OR add them to your potential new gig.
It sounds like you've worried a lot about this. Realize things that aren't going to change because you (or anyone else) *worried* about them. STOP WORRYING. Either: Make the change, or do NOT make a change. If you change, and it doesn't work out, go back to your previous gig, and ask for your old job back. But ACT to either improve your current gig, or ACT to take a new gig.
In the meantime... All The Best. And realize there are other mustachians here who are in your corner rooting for YOU!