Little info on the current server:
Dell PowerEdge 1900
Intel Xeon Quad Core Processor SLAEJ E5345 2.33.0 Ghz 8m Cache X2 (so total 8 of cores @2.33 GHz)
16 GB of PC2-5300F ECC (maxed out, mobo will not take anymore)
6 WD Black 1TB HDDs. Raid 1+0 with 5th drive being a failsafe for the other 4 and 6th HDD is a stand alone and is used as second backup location for the AC database backup. So 2TB is my OS and AC drive. I know this is very redundant, but data loss is not an option or a risk I'm willing to take.
OS is Server 08 R2 Standard SP1.
As for LAN, everything is hardwired in @ 1 Gbps.
New server will be ordered whenever new Server OS comes out with the OS. Which, hopefully, will be in the next 2 years from what i have seen of Microsoft. The PowerEdge will get reconfigured for something else, will cross that bridge when we will get to it.
As for a new server, i was thinking something along the lines of 16+TB of HDD space, 96-128 GB RAM, and whatever will be a decent CPU at the time. Also SSDs should drop even more in price and increase in size. But time will show. And Yes, $5000 to $7000 on a up to date server is to be expected. Also, a decent local server will always be faster compared to a cloud server. So i don't consider that as an option.
Placing everyone on a domain is part of the planned things for this trip. This wasn't needed before. I made the AC folder shared and password protected. So in case of loss of path or addition of a new terminal, path on a the terminal was specified and problem solved.
Also, the reason why i'm here asking these questions is because i'm trying to learn and become more self sufficient.