I would not bother paying somebody a lot of $'s to get it aligned. if it has slight play in all joints from wear over the years it wont go down the road how they align it anyway. As said above, I'd try to get closer to 0deg camber and 1/16 toe. 4 to 8 deg caster
2 sub box
https://www.ebay.com/itm/396546892894
i'd personally go with one quality sub and a smaller box. Takes up less space, less weight, probably sounds better if it's one quality rather than 2 cheap and less amp needed.