Website Redue

i have a website called [login to view URL] its a website for buyers and sellers and it has an access database running it all , i want to redue the entire site so that it runs on sql and i want it very similar to [login to view URL] i want users to be able to upload unlimited number of photo's and a way to control this on the backend like if the customer wants to upgrade there account then they will have to pay and once they do that then they can add more photos to there listing. This site currently works like this 1. signup its free 2. they add a listing -free for brokers 3. once a buyer is interested in this listing then the seller will get an email and then he can choose to upgrade there account in order to gain access to the buyers information. basically the website only charges people for when a buyer is interested in there listing. I need this done asap im a programmer but i run another business and have no time at all and need someone with detailed skills to go through this and make it very user friendly and easy to manage everything including a way to email users and track everything. i have an ssl certificate and already have a script that i can use for the authentication for payments i have been using paypal just havent had time to setup this on this site i have it on my other sites. any additional upgrade features would help alot, i want to automate this site as much as possible i keep getting people saying i cannot find the sellers contact information, i want this to be an easy signup and listing process that a child could do it not alot of steps ,and have a place where i can adjust the settings everything like if i want the seller to pay upfront for the listing then i could if i wanted. i think that is it.