When we started using AC, we used it only as a scheduler. We actually used a refurb $300 computer with win xp home edition. When we started using it to bill, we then "upgraded" to a little more expensive $400 win xp pro machine. But we did regular daily back-up.
Since we started using the EHR function, we now have an inexpensive Windows 7 Pro machine, with RAID1 mirrored drive (for what its worth), 500GB dual mirrored hard drive, at a cost of $599. We do back up twice a day, morning and night. Currently AC online automated back up is not working!! They claim that it will be fixed with version 6. They claim that if you change the time for the back up, it will work (it will not, you'll have to reboot the computer before it will "automate" backup. So we manually back it up daily to an external fireproof hard drive (1.5 TB, about $250). And manually back it up online to AC.
So far, every thing is working fine. The limitting factor is the terminals, and not the "server". We have about 6 terminals hooked up to it, a mix of Win 7 premium home, win 7 pro, vista, and xp pro.
