Automated subscription tipster service website building

Hello. I am looking for someone to create myself an automated subscription website in which members buy the service, they then have a username and can log into the website to see the information.... People who don't subscribe to this service can't see the information, but can see other pages, like about us and home.... Can you help me? Small budget web site but good quality. Will pay 50% when first design is done and other 50% when all work is complete and I am happy with it. Thanks