What are some good business ideas in a tier 3 city for a retired person?

Answer 1

What might sell in that city? Ask around rather than getting random ideas online. Ask some people what sort of store or service they would like to use in their own city.
Then, prepare a business plan to see if you might have a viable business.

Answer 2

Check out the Excellence-Success website - there is a section called 'Wow Ideas'

Answer 3

would be wise to to some market research in that area to find out what is needed