It's for an open source project, not an internal work instance or anything. As a student at uni with no full time job, adding more monthly charges is hard to deal with.
Now none of that's true.
And after all that, hubot still ran pretty damn slow. :(
https://wiki.debian.org/RaspberryPi
Still, Debian only ships nodejs 0.10 (even Sid) for now -- and I'm not sure what the status is for compiling node 0.12 on armv7 (it apparently has issues on armv6 which the rpi v1 runs).
Fwiw, if you can get by with node 0.10 for hubot (Which I think you can[1]?) -- there shouldn't be any problem:
http://archive.raspbian.org/raspbian/pool/main/n/nodejs/
Unless you need to compile your own nodejs binary for some reason?
[1] https://github.com/github/hubot/blob/master/package.json
Don't know what I'm going to do with them. They're useless if they're not up 24/7, but I can't justify wasting $84 a year on them either.