I did not mention mini towers:
Just so happens that the cheapest Mac is called a Mac mini.
Just add another drive for Time Machine backups - which I expect most people have/are doing anyway.
TimeMachine is one of the best backup solutions around - and a major factor why so many people love macOS.
You can do way more with ARD. I need to verify this when I test it but from my understanding you can:
- Access your files securely (copy to/from your remote machine)
- Use any of the programs on your remote machine
- Send/receive email from your remote machine
- Browse the web from your remote machine
- etc
There are many, many advantages.