Ah, I'm sorry about that! I'm new to this, as I'm sure you can tell.
I'm using a regular DS but I'm thinking of getting a 3DS with my next paycheck; it'll be a lifesaver if Connectify-Me works, so thank you for the tip! Hopefully it'll be more convenient for you if we do any future trades.
In the future, click "View Conversation" and post any further VMs there so I can get notifications when you respond.
I am also a university student who used to encounter that problem; do you have a DSi or 3DS and Windows? If so, you can download Connectify-Me and turn your computer into a hotspot and connect to Wi-Fi that way, the DSi and 3DS are explicitly supported. I use the free trial and it works just fine. If you have a Mac, I hear you can share internet via Airport or something but I'm not familiar with Macs.