Hi,
After carefully reviewing your request, I am ready to help build digital downloads marketplace you to because I have 15 years experience in system administration and programming.
I would like propose partnership with our company Tangram for your project. Your project is a piece of cake for our experts. I lead small team of developers, designers and 2 system administrators, so we'll be able to help you with administration. I think the best idea for you to get team of professional than hire separate programers. It'll be more easy to manage team than separate programers. We have strong experience as System Administrators with different OS Linux / Windows, rich experience with Network Administration.
I'll be happy to interview with you to review your needs and assets. Looking forward to your response and wish you a great day ahead.