Commute aside, think of it this way.
Your hours will be considerably longer than your current, cushy 9-4 number.
If there is a problem you are 2 hours away from sorting it, for example people calling in sick.
I say if you do it, rent your house and move near to the shop.
Or rent a room near the shop and work blocks just travelling back/ forth for your days off.
I used to do 9 hour days with a nearly 2 hour commute, honestly, your life will disappear on days you're working, you'll never have spare time and when you do you're too tired to do anything. And you'll never have any money, spent it all on petrol, car repairs and maintenance.
If you hate your job get out of it, but I seriously doubt you'll like this more unless you move down there.