With Ocarina of Time + Powersaves, you'd have to start Ocarina of Time, load a save, and open the inventory every time you want to use homebrew, and even then, future firmware updates could render this unusable. (And because of the PASLR stuff, this still might not be able to manage Sun/Moon saves.) Hard mod installers can install CFW, which comes with much more benefits, like the ability to install homebrew and ROM hacks to the home menu. Hard mod installations usually cost around 40 to 60 USD, not including shipping (so anywhere from 50 to 80 USD total). As @Ammako mentioned, purchasing another 3DS is an option, but if it's on 11.0 or above, then it won't be any more beneficial than keeping your current 3DS.
Careful with this. From what I can tell, Nintendo is pretty inconsistent on this. They prefer you do a system transfer, which requires access to two consoles.