Do you know what speed your wireless router is? I don’t know how much you know about wifi but there are a number of speeds a, b, g and draft n. a is no longer used and provided 54Mb/s over about a 15m range, b is rarely used (you might be on this) and is only 11Mb/s over a 45m range. g is the most common today and is 54Mb/s over a 45m range. Earlier this year n was finalised and became 600Mb/s over a 91m range. These routers go for anywhere between $100 and $300 (AUD). I reccomend checking out what your current router is (a/b/g/n) and upgrading. By the sound of it you’re on b which would be very painful. If you are using ‘g’ perhaps the signal strength is rubbish. A new router with a stronger signal would help