Regarding Majora's Mask 3DS, I just need to get the Kamaro Mask, Couple's Mask, Postman's Hat, Romani Mask, Troupe Leader Mask and Mask of Truth. After that, I can go get the Fierce Deity Mask. The plan here is to kill Majora, then after I beat him, kill again but this time with the Fierce Deity Mask.
After that, I've got Bravely Second to play (On Chapter 2, went off to level grind because I foolishly let Angelo inflict my healer with Ghost status). Then I have several more games on my New Nintendo 3DS (which yes, still isn't a good name because it's confusing) to play before I even think of buying anymore. I might go back to SMT4:A, kill En no Ozuno (because I really wanted the full challenge of Twisted Tokyo) and then go to YHVH's Universe and hopefully (paraphrasing Dagda) drag YHVH off his throne.
Phew.