I don’t understand why you’d need to pay anything.
If you're changing the name, there will be no follow
through whether you pay him or not.
Does he own the building? If so then pay him rent.
If he doesn’t, cut a deal with the real owner of it.
Then you are looking at paying $10k for good will
and a customer list. If you can rent that location,
or one close by, his old customer base will find you
without you needing to spend $$ as he is no longer
in business in that area.
If you're changing the name, there will be no follow
through whether you pay him or not.
Does he own the building? If so then pay him rent.
If he doesn’t, cut a deal with the real owner of it.
Then you are looking at paying $10k for good will
and a customer list. If you can rent that location,
or one close by, his old customer base will find you
without you needing to spend $$ as he is no longer
in business in that area.