Cashback Engine Theme

Hi I am looking for an estimate to 1- enhance the existing cashback site code or 2- build the new cashbake site. Option - 1 I am using the cashback code from [login to view URL] I will need to enhance the template to look similar to starthere.com.au. Also what would be an additional cost if I would like to include a feature of multiple level of membership, so that user with higher level of membership can get higher cashback. something similar to this: [login to view URL] Option - 2 I am open to any other cashback script. If you have any other script, other than cashbackengine I can also use that. If it comes with good features. Looking forward to hearing from you.