I've been trying to think of a specific business to recommend, but it's hard without knowing your father a little better. I think you can make money in any business and there isn't necessarily one business that's auomatically better than another.

That's why I was asking about what your father likes. I wasn't asking in terms of what kind of business he likes and wants to own, but more in terms of what are his interests outside of work. What are his hobbies.

Is he a sports fan? If so then he could open a trading card store or a sports bar. Or a sporting goods store. Does he like to read alot? Then maybe a bookstore.

Is he the kind of person who prefers to be behind a desk? On the phone? Active all day? At a computer? In the company of others? by himself?

I think it's really hard to pick a business at random for someone else to go into. If the type of business really doesn't matter I would suggest trying a search for 'franchise opportunities'

Here's a site I found when I searched http://www.franchise.com/ It looks like a good site to get ideas about what franchises are out there.

If I knew a little more about your father I might be able to offer better suggestions, but without any kind of details it's hard to simply pick at random.