Indeed, better safe then sorry
My SO's dad lost everything once. I set him up with a small RAID 1 box (2x500gb) and he is now happy...
Luckily computers do not cost as much anymore. My laptop for 290€ is amazing, and you can even get smaller ones for 200, even 160€.
Then there's always the refurbished route. I got a friend's father a 140€ dual core computer three years ago, still happy.
For a school a few years back I got some 30€ computers as web-browser and word processing stations with a shared printer.
If I think back what my first computer (not counting the cpc) did cost... and it only had 8mb of ram and a few hundreds of megabytes of disk space, and that was pretty nifty back then!:-)