My real bid is $350
I am including
password protected members site (with IP tracking to detect and report on accounts being used from multiple IP addresses)
affiliate program - allow other pages to refer visitors for commission.
Packages Administration - add a 3 day trial plan, a 7 day trial plan, a 2 month special discount price, standard monthly plan, etc.
My bid does not include a graphic design, I can take care of this too, either custom or template.
payment integration with CCbill , ibill, linkpoint
your biggest choice is either 3rd party billing, where you get paid monthy or twice a month, or a true merchant account, where you get the Credit card charge instantly.
The second is more expensive, with 50 dollar monthly fees typically. (But they offer a lower processing rate)
Might be best to start with the 3rd party.
your members site will all be plain HTML, so you can edit that with frontpage.