You add nothing by creating services if infrastructure is lacking. If u built one electricity power-plant, you will generate customers from every sector. Residential, Hotels, Factories, Schools, Hospitals, Telecommunication companies. You would leave an impact on every sector, because everyone needs electricity. The machine need a power source in a factory, the homes, hotels all need power source for their tv, phones, laptops. T
Telecommunication sectors need a power source for their servers. Every1 needs a power source basically. You would make a personal killing while also addressing a problem area in our economy. If electricity is sufficient and cheap, this will allow everyone to return. Business people for business projects. Diaspora for residential projects. You basically created a space and from that space all these various actors will start flooding the economy. But if you add a service, it won't create that similar multiplying factor an infrastructure does!!!