The private key storage part is bad. What if you have a house fire and your laptop and all your clues burn? Just save your private key into something like KeeP

The private key storage part is bad. What if you have a house fire and your laptop and all your clues burn? Just save your private key into something like KeePass with a long ass password and a couple of million of hashing rounds. Email the KeePass database to yourself, your family, put it on your server, all your computers, your cell phone, etc.