It will de-sync while playing even after you get it working.
For reference, my server is a Dell PowerEdge R710 with two Intel Xeon X5675 CPU's @3.07GHz, 80GB of ECC paired RAM, and 4 SSD's in RAID1. (The SSD's are literally almost as fast as the RAM in data transfer speeds.) Building the map took a little over half an hour, and required close to 32GB RAM with a 25% CPU load. (more load than I have running 8 servers)
Playing on a local gigabit network, it takes about 3 minutes to log in initially, and a little over a minute afterwards. After playing for roughly half an hour the de-sync with the server is horribad, and makes it almost unplayable. With a 400mbps internet connection, it takes the average player almost 10 minutes for the initial download, and 3-5 minutes to connect every time. They de-sync in 10-20 minutes.
10k maps are pretty sweet right now though. Literally takes a minute for the first connection, and 20-30 seconds every time afterwards.