>>>Since the thread drifted from Bernie to golf, I might as as well take in another direction :). If and when you retire, what happens to the customers to whom you sold a vertical application written in VFP (I presume that you have a vertical app, as many of us here. But I am mistaken, then the question is moot)?
>>>
>>>Obviously I am asking because I don't know what will happen to my customers when I no longer can support them.
>>
>>Then you move to .NET and SQL Server :)
>
>My app is already using SQL Server but to port it to .NET is not something I can do on my own (especially while supporting existing VFP application).

Search for a buyer while a few years away from retirement and when you are earning good money with it.
Bodylease yourself for the last year before retirement: still earning, but strategic decisions already on new owner.
Protecting your customers in case buyer is stupid/a louse will require thinking in advance, honesty in bargaining AND a good lawyer.