Just a few ideas while you are waiting. If you are in a RAID config, it is either RAID0 or RAID1. RAID1 would be the choice so you have redundancy. Acronis is a great backup software. I stopped using them when they got too difficult for me to understand. But, can't go wrong. For me, the only thing is I like at least one full backup a night. Not sure what is on your main computer. Only AC? If not, then you are backing up to only one place and that is probably right next to the server. But, it sounds like you do have one good backup.
My biggest question is where is your EZ Claim software? Is it on the main computer? So, it is getting backed up by your WD drive. If it is, then you have two backups of the EZ Claim. If not, I don't think I would be comfortable with just having your biller backing up to her offsite computer. How does it get there? I just think 1. It may not be a good idea for two people to be involved in the backup, 2) Is it encrypted from the office to her computer and who has access to her computer, and 3) I only trust myself or a commercial IT person to do backups. I know nothing of your biller, but the only people who quit or I fire are billers. And, most of those didn't go very well. So, I wouldn't want a single employer to have the backups to what may be the most important data you have.
Do you have the name of that tech. Because I don't think I want to get support from that one. I do have to say that AC's backups are pretty good or were at least when I could restore them.