It is a good thing to have a backup if the servers go south. One way to combat this issue is to have 2 PCs that are fully functional and can still work with apps. that are usualy supplied by the server. Save the data on the local PC, then when the server comes back up you can update the data. Just have your data saved from another server and not your app. server. Most companies already have PCs with apps. and still connect to servers with apps.