My dad has owned convenience stores in the US in the past (in the 1980's until he had a falling out with his partner because my Dad wanted a drive-through pharmacy and the guy wasn't having it...he will never stop telling that story and how he was a visionary...), and was intrigued by 7's dominance here.
My dad was considering opening one here last year when my parents came. He had me call them to discuss the options and decided against it because there's no way to alter the prices on goods in TW because of consumer protection laws. Basically the same bottle of water in Taipei 101 is the same price as the one in the middle of nowhere Zhanghua. The only way to make up for the extreme difference in rent is to hope you have increased traffic, which means increased turnover of goods, which means restocking more frequently, which means hiring more workers. Restocking is also inconvenient for certain locations, as well. The only way to increase the price of goods is to be located somewhere like Green Island because they can get away with surcharging for stocking goods (it came over on a boat), but even then it is literally only paying for the cargo charge, no profit there.
We learned that 7 makes a good amount of it's money from bill payments and related things. Apparently 7 is just doing a wire transfer from their own account to whomever you have to pay. If you look at the barcodes, it's just the bank, account number, amount, and customer number in the memo spot. Nothing complicated there. That's why they only accept cash for these type of payments. They need to back up what they put out of their accounts immediately with real cash in the register. It seems that just owning an iBon machine that can accept cash would make far more sense...hmmm...that gives me an idea for back home...
In the end, he decided the only place to open a 7 is on a main road in a place outside the downtown area. Basically to be the only one in that area with a relatively low population. The only way he would have opened it is if it were easy for me to check up on for him. That, and I wouldn't be able to give myself an ARC to be 'owner/manager' or something official to do things on his behalf because I haven't graduated university and it just seemed like it was more trouble than it's worth. For our situation, anyway.