Hi, Actually, u r taking the problem as much smaller then, actually it is. The above 500$ will be our charge to design the entire functionality of your site, however, you will also be required to buy, Firecracker video software. This is available from 2500$ (5 performers license, each performer with unlimited visitors) to 24500$ (unlimited performers).
Second, ur condition, of paying 4 days after loading everything on ur server is GROSSLY UN-REASONABLE
We can definitely perform the entire job for u, for just by charging 10% token advance, and rest of the 90% u will have to pay, after we demonstrate and comply the product, as per ur requirements, on our server. Once u say OK, pay us and we will send the entire Code to u in email, so that u can configure it on ur server.
For an addiional 50$, we can assist you in configuring the site on ur server, in case u face a problem