Well, it depends on what kind of life you're planning to live here I guess, hehe. You won't be able to buy a central apartment in the largest cities and drive a Ferrari but getting 17500 crowns a month when the taxes are paid are not too bad. Most workers (no higher education) probably make a couple of thousand crowns less and the average academics probably make a few thousand more.
And most swedes speak english well so it shouldn't be a problem making yourself understood. Could be trouble finding a job though, but I guess that's not your plan anyway.