My wife built a site for our camellia society, up and running in about 2 months, less than $500.
http://www.camelliaweb.org/
A similar site that we know has spent $50,000 for similar stuff. They are up and running after about a year. Their negotiations with different companies ranged from $35K to $150K.
A couple of others she did, don't know what she spent.
http://www.camelliashop.com/
http://thelandingsgardener.com/TLG/index.php
(I don't think she is in the "want to do more" market)