Starting a F&B business in Singapore?

My two younger sisters are quite blessed.

The first one is married to a family who is doing food business. Her mother-in-law cherished her very much. Recently their noodle shop at Cheras became famous after they were interviewed for a TV program. Their noodle is special because they use their own recipe. The number of customers is increasing day by day.

This mother-in-law wants my 2nd sister to look for a shop house in Banting to franchise her noodle food business. The plan is to teach my sister how to make the special noodle and share the profit from the business. According to my sister, they will need to hire at least 5 person to run the eating shop. Now she is looking for a fully furnished shop house with affordable rental price.

I am thinking: If the franchised food business is successful, I may be interested to franchise the business in Singapore. F&B franchise brands like Secret Recipe, Yat Kun, Breadtalk, Pontian wantan noodle, etc. also expanded their business in this way.