Thinking of possibly making this account into a hand cannoner, just trying to get a second opinion, and possibly a guide if anyone knows one, of what quests need to be done to get the defence levels, and etc.
Don't make that a hand cannoner. A prime hand cannoner will have 1 prayer, 1 attack. Keep that as a pure and make another account if you want one badly enough.
Also: They do own, I have a low level one myself. You won't be disappointed.