I had this while I was at uni for a few months, until I got broadband at my flat. It's doable. Just be careful, obviously no Youtube and whatnot, keep it to emails and basic browsing - RS didn't use that much from what I remember, it might be different now. The initial download while RS is loading used to be 12mb and then about 10-15mb/hour for general playing. You'll have to get new info on that, because this was ~2010. Good luck!