I was thinking of getting myself a pi, sticking an old 2.5" laptop disk on it, and plugging it into the back of my Mother in law's broadband router, and then rsyncing my own backups over to it to have an offsite backup. I would also probably have her PC backup to it, and I would be able to rsync those backups to our house to offsite her stuff.
I've already got the 2.5" disk, and suitable power supplies, so the only outlay would be for the pi itself which would be headless & keyboard/mouseless once it's been initially built.
I'd set up dynamic DNS for her place, use ssh for the connection, and would run ssh over a suitable port which would need to be opened up & forwarded on the router.
I probably need ~20-30GB of storage and I've thought of using dropbox/google/microsoft cloud storage but then I'm into the realms of paying monthly for that amount of storage, and I'm putting my stuff into the hands of the mega-corps so I'm not that keen.
Are there any potential pitfalls that I haven't thought of in this setup, or anything else I need to consider?
Do you think it's worth doing, or is it just too much hassle?
I have been touched by his noodly appendage.