Voip Termination configuration Asterisk

We are looking for an expert that can help us configure an asterisk server with cards to terminate on analog lines. We have 16 channels so we need to know: What computer specs to purchase to run the 16 channels? How long it would take to configure? What software needs installing on the local machine? (elastix???...) We need to make sure it interconnects with our device to terminate the calls. Also we have an E1 and a quintum and need assistance with the configuration of the quintum. Please submit serious bids and please have the adequate experience. This is for an immediate start. Thank you