Most people don't know that banks make a lot of my when they purchase airtime from their account, with a 100k you can start a Virtual Top Up business in Nigeria where you help people recharge their phones and you get a commission.
You can as well start become a First Bank Monie Agent and help collect deposite, pay bills and do other transactions that a bank does.
Restaurant business -Most single young ladies and men of these days prefer eating at well decent restaurant where delicious food is being served. Restaurant business is a flourishing business especially in most cities like Lagos, Onitsha, Abuja, Port Harcourt, Aba, etc where people are highly busy that never find time to cook by themselves. The business is not capital intensive. With N70000 you can do this business. The two most important things necessary to succeed in this business are ability cook nicely and neatness.