A Shoe Shop is a good idea but competition is tough, from the inside and from overseas.
Internally you will have to compete with a lot of women who import shoes in suitcases (many suitcases and frequently of course) who pay very little import duties or none at all, i.e. smuggling. These mainly sell to a middle-higher end but smaller segment of the market.
Externally you will have to compete with a growing amount of imports coming from China and other low-wage countries, whose cost per pair of shoes is around One Dollar (yes, US$1.00)! and pay some 20-30 cents between duties and other taxes. These mainly sell to a middle-lower end but a much larger segment of the market.
But on the positive side, the domestic shoe industry has virtually disappeared and has been susbstituted by imports; so other importers will be your main and maybe only competition.