@Till23 that's a lot! I cared for my  dad too - I deserted my own place for a couple of years - and started trying to pack up his house after he went into aged care, but horrendous family arguments blew up with my siblings who'd done nothing until then.

You've done amazingly well considering your health challenges. Yes mental health too. 

I hope you can pace yourself. But packing up your Dad's place sounds important. Sometimes there's a local company who can do a lot of the sorting  disposing and packing for you.