Transporting greenware is a real pain and something to be avoided with the extra handling, travel time and inevitable breakage.
Assuming that you could fit a kiln load worth of pots in your car, when you factor in loading you are easily exceeding 2 hours round trip (likely more) for the bisque and another 90 minute round trip for the glaze firing. Then you have to go back after the glaze firing to pick up finished pots. To me, that's a lot of time that could be spent making pots instead. Ultimately, you need to factor in the value of your time and expenses associated with travel.
BTW, if you have to upgrade the electrical service, make sure you install enough capacity for any reasonable future growth.