you can try it with o3ds, but I can't guarantee it will work. I also don't have that kind of money, since I'm on disability. I'm already going to owe my mom $50 this next month for going over the limit on our internet (trying to redownload all switch games for my other switch, so I now have 1TB for both switches and same games). I've learned a bit. transferring content from the nand is about 1GB/minute and you can't download at the same time as it will cancel those downloads. also, no game is added to a secondary switch. I have 20+3 lines on my n3ds but my o3ds only has 17 lines of content. however, I've also learned that nintendo took precautions in case you forget to use your save on the secondary switch (it won't overwrite the good save by default).