Dan,
That is a very difficult question with a myriad of answers. The first recommendation would be to simply Google "online backup" and you will get the huge list of companies. Most of these, if not all, started out with the intent of backing up home computers. And, as you will see, most have evolved and offer home and business models.
As with anything, you will need to decide what you are looking for in a backup program:
1. Cost
2. Security
3. Ease of use
4. Whether it uses compression, encryption and/or deduplication vs incremental, etc.
5. What is your need to seed
6. What is your need to have a hard drive delivered
7. Key: Does it backup databases such as SQL Server or Exchange or SharePoint
There are the major players such as CrashPlan Pro, Jungle Disk, Mozy Pro, Carbonite. Each have their advantages and each have their faults.
One of the top backup programs which has evolved from its humble beginnings is iBackup, which does it all with dedupe and SQL backups. Hard drives to your doorstep, etc. CrashPlan Pro or Enterprise does not allow seeding and does not send hard drives anymore.
Some of these are real time backups known as CDP or Continuous Data Protection. I am not sure if I am a big fan of Cloud CDP yet. With CDP, it is imperative to have versioning "the ability to keep multiple versions of a file" otherwise you do not have multiple backups.
What you desire may not be able to be done online and would likely become pricey if it were done by the GB or even by bandwidth. Plus, with most online backups, if you send say 28GBs of initial data, this may take 3 or more days. This is why some companies allow you to seed. Copy the info to a hard drive and send it to them. They then copy it to your account.
I would highly recommend that you do your one week, two weeks, three weeks, etc. locally using local software. Using external drives, you can easily schedule these types of backups.
The thing, though, with multiple backups, after your get past five days or so, you will have lost a lot of data. Losing a lot is better than losing all, but if you have redundant backups, that won't be an issue. Most people do backups that cover months are to be able to go back and grab files if ones were lost or corrupt. Your strategy for a virus is probably not a very good one. If you had a nasty virus or malware on your computer, then restoring a backup from two months ago is not a great idea. Yes, the virus is gone but so is two months of progress notes.
Personally, this is why I don't think it is a good idea to run AC on a computer that someone also uses. And, especially not on the reception computer where that staff member is proably more likely to go on You Tube and Facebook, etc.
So, in summary, it is always best to plan and implement a good local backup program to multiple drives and go back multiple days. The online backup is just more insurance. You basically want:
Onsite
Offsite
Online
Also, as far as the delivery of the information, it really doesn't matter if it takes 10 days. It is basically for catastrophe, so if there is a fire, flood or hurricane, getting your data back tomorrow is likely the last thing on your mind. Of course, if the catastrophe is that your server were stolen, then gettting it back fast would be necessary. But, you should use your local backups. If they were stolen, you still have your offsite. I like the idea of a pseudo-offsite. I am lucky to have a basement which is over 100 feet from the server and not easy to find. In other words, if someone grabs my server and backups, which makes no sense anyway as they are not out to cripple my practice just to get the data on the server or the hardware; they aren't going to know about the two Buffalo NASs in the basement. And, these are RAID5.
Hope this helps.
