neighbors wifi
Reminds of something me and my friends did once...
My friend was visiting and my internet was being all fucked up, so we tried using our neighbor's wifi.
It required a password, so we tried Porn and it worked XD
Anyways if you can, try finding a wifi network nearby that doesn't require a password. Even with low signal strength, it should do the trick for posting on the forums.
As for your (precious) rank, you shouldn't get demoted due for a justified reason. Hence it might not be even approved until you get back.
Anyways, good luck with your financial problems my good sir.