Starting a business should come with passion so as not to run out of the business, the elderly may want to into poultry business, food stuff business, clothes selling business. This may also be important;
You need to really prepare before starting your business, understand your business, plan for it and then aceit. The first thing is what is your purpose of starting a business, who are your target audience, are they youth or adult or children are the closer, that is proximity, is your market far from the or close to them? You need to consider he market structure, you also need to consider your competitors are they giving out the same products with the same price check those things out
To gain back lost customers, you must understand why you loose them in the first place, what customers ask themselves Is; Is your products Solving my problem? Am I deriving utility for his product? Then get feedback from them, hear there Testimonies and complains, here there suggestions, and work on it, you can also do incentives, give out some products for free, you may need to contact them aswell, improve your products to compete with competitors aswell