Hi tmchenlin,
Ok, I will be very upfront with you. My Joomla Developer has got 7 years of Joomla experience and he has been involved in many Joomla Projects from scratch and middle.
He is a pro and a serious developer.
My approach to the requirement would be like:
@ I will need full access to the site for full analysis on the Module. I will inform you in advance about the hours this analysis will take and will charge you accordingly.
@ If the work done found to be more than $800, I might skip the charge for Analysis.
Its as simple as this, You have to trust me on the Skills of my developer and I will give you what is required, ON TIME.
Let us discuss more in detail and have your space details for the site, shared here.
Regards, Deep