There is a good book on this topic by Muhammad Yunnus - Banker to the Poor: Micro-Lending and the Battle Against World Poverty, https://www.amazon.com/Banker-Poor-Micro-Lending-Against-Pov....
Overall, it is difficult to be even stay in business let alone profitable due to structure of how interests work at that income level due to most not paying back on their loans.
Overall, it is difficult to be even stay in business let alone profitable due to structure of how interests work at that income level due to most not paying back on their loans.