Just break it down and break it down again
Work out all the pieces...forms, db backend, interface to go through the form data, emails, capture...how they fit together and how they fit in to whatever your framework is, then you can start working out how many hours it will take.

Then add on, say, 10-20% more time to be pessimistic on bug fixing and account for time dealing with the client and other general project management, then decide how much you want to be paid per hour. Don't add tooooo much extra time on, but do work out what your minimum hourly rate is, so you can see how far you can afford to go over time.

Hope that helps :-)

(Wish I could live up to that myself or convince others to, would make for much less bitching around here)
(MrOli is ugly, but in the morning you will be sober, Mon 29 Dec 2008, 9:18, Reply)