How do I become a tiny ISP?

[tomh@xxxxxxxxx]

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Several of our PC-based customers use AOL to get on the internet and
transfer files to our system (via FTP batch program).  They're not happy
with AOL service, for whatever reason, and local ISP connections are an
expensive option for them.  My boss would like to give them the option of
us being their ISP, and then letting them FTP the files to us.  FTP only,
nothing else.

How do I make this happen?

Tom Hightower
Solutions, Inc
http://www.simas.com