I live 3 miles away. Once my car was broken down and i rode my bike. It IS possible but in Houston heat I like A/C...
As far as jobs go, retail (not only Target) is a lousy way to pay bills. It is not best suited for a sole-souce of income. It is not worth a long commute, childcare costs, etc... It is great for "supplimental income." My household bills are paid by dh's job.
I work because it insures us in case of a loss. If my husband were to lose a job, I could ramp up hours (I've been cross trained throughout the store, and have proven myself to be a good employee) which is way easier than getting a job "cold." Would it cover my household bills? No, but it would suppliment unemployment, and slow the dwindling of our savings.
I also have a 401k to contribute to. Target matches 5%... which is rather generous. I choose to set aside 25% of my meager pay in my 401k. It'll be a nice addition to the big 401k nest egg dh is saving in his job.
All the while 15% off groceries. Whether I work or not, we still need to eat.
All in all, I still consider myself a SAHM... but a little bit of mad money, a discount on every day needs, an extra boost to retirement savings, is enough for me.
I am a SAHM with only a HS diploma. It is what it is.

I am the queen of sub $10/hr jobs. As much as Target works for me... my most "lucretive work was working at a daycare ($8-11/ hr full time, weekends & school holidays off) and working as a bank teller $9/hr in 2000... daytime hours, no weekends, many random holidays off too.)
Right now, I don't want to work that much. I have 3 kids, lead scouting, lead church activities. My plate is full...