Well, it may get even slower, I love it when non-IT people try to do IT things:
Anrea... well, you haven't played enough amiga games!
It's ok about ISPs, I work in the industry, I just can't be bothered. whirlpool.net.au is the best place to see what's going on. Maybe I could save $10 a month or so, but we don't have great internet in this big red land. If you want larger quotas and higher speed, gotta pay through the teeth.
However you set it up will be cool of course, as you are the one doing it. I just hope you have enough quota. I suppose you can monitor it of course and see how things go and adjust.
If you didn't want to leave your computer on 24/7 you could get one of those cheap NAS devices and run a web server/ftp server etc off that. I have one of those and it's pretty neat with virtually no admin required.