1/2 hour commute for lessons is just about right for a busy adult.
I don't know that area, but if you really want to go with an independent CFI, and just want to get to solo, you might want to consider an uncontrolled field in the area...There's one up at Concord (CON) and west of you there's Hawthorne-Feather(8B1) near Hillsborough.
It's just less of a hassle at an uncontrolled field, and if you're not going to get your PPL, there's not much reason to fly at a towered field.
And you can do what you want, but I'd advise you to at least consider the Sport or Recreational tickets as a compromise...twenty hours is not as small a commitment as you may think, and rather than do half the PPL then realize you'd really like to go further, with the Sport you'd be done at 20 hours (minimum), and you'd be all set for fun flying as a real pilot. Might be hard to find an LSA for rent, but I bet you could find or form a partnership.
http://www.sportys.com/pilotshop/studen ... age=recpriI'm curious: if your plan is to follow the PPL curriculum until solo, then what? No mor flying? Flying only with a CFI aboard, or getting a sign-off for solo hops around the pattern? Just wondering. If you have no plan beyond that, you might want to stop and come up with one, particularly the alternatives described above.
More advice: you can avoid these questions from me, but I guarantee any serious instructor will want answers to the same questions before he or she flies with you, or at least before they sign you off to solo. So do alittle research and think it over.
To find an independent CFI, other than just hanging around airports asking people or putting up flyers (go right ahead- most FBOs have a bulletin board; just don't do it at a flight school

), you might consider getting a membership in EAA and/or AOPA and putting the word out on their forums.
http://www.aopa.org/http://www.eaa.org/Good luck, and keep us posted on your progress!

PS- if you have abandoned the idea of getting your PPL (or PSL or RPL) because of time, money, or diffculty, think again... I had the cards stacked against me on all three counts (I had no money, I was working a lot, and was already an "old man" in my 30s and not terribly bright or disciplined to begin with), and I made it regardless.
It was rough, but I just kept my eyes on the prize. The other thing that motivated me highly was hearing that behind my back, a friend had said "he'll never make it!"
