Sounds good, but maybe a few small glitches. I think most of the commercial cloud websites are SQL compliant now, but you need to make sure it can back up SQL. Of course, if you do the SQL backup locally and then move it to the cloud, you are probably OK. You should also look at Amazon Web Services or Azure. Something very vanilla but will be there a while. You mostly pay for the data size. I am not sure if you really need those things in the cloud. A backup on the computer plus backups to three external drives in various places. A very expensive fireproof and waterproof safe would help. Safety deposit box. A friend's house after it is encrypted.
As for version 11 on your computer. You would need to check with AC. First, since it has never had a version installed, you would need AC to install it with activation code and your backup. I don't know, but maybe it needs to be installed at your office if part of their activation has to do with your IP. I don't know. I also don't know if it has to be connected to the Internet to "phone home" when obtaining files. Probably not. If it crashes, you would need AC to install it. Maybe have to pay for an entire license. May be better to have a inexpensive server with Hyper-V and some VMs with some on another computer. You would have to talk to Sandeep about that. The key thing is that if you are going to have a computer at home, you need to know:
1. Can you install to a new computer if you don't have support contract?
2. What would happen if you needed to install again?
3. May be better off with two PCs, so you can install to one, then install to the second one, so it is already installed.
4. Need to know what happens when your license runs out. Can you just pull the plug on the Internet and make records without a connection?
5. You will likely run into some issues if five years down the road you need to install to a new computer. I think if your computer it is on is fairly new, and you aren't going to be using it, it should run for quite a while.
6. You can make tons of AC.enc backups to a couple of drives, given you aren't adding anything.
7. You could also ask how much it is to use the offsite backup per year. May be worth doing that.
8. I don't think you need to do this until the end of your life. With adult patients, I believe it is six years. With pediatric, it is up until 18 or 21 plus six years.