franchise fees. could be hundreds of thousands or millions to get into a big brand name.  could be 35000 to buy into a 7-11 or 20000 to get into a failing distressed disgusting shithole store that doesnt make a dime and someones desperate to unload. theyll go in there and profit a little by working 16 hours a day 7 days a week. see this a lot in mexico too where they just cant afford to hire someone because there isnt enough profit to squeak out $20 a day
Mexico