Can I address your health concerns:
The wireless routers network uses the 2.4 GHZ range which is the same as a household cordless phones, wireless cameras and many other household wireless products. Even if you don't have wireless in your house you get hit by these frequencies every day by other peoples devices. Proberly even ny your neighbours wireless network/cordless phones. Do you have a T.V. as thy use radio waves in the lower range. Do you have a microwave? As they emit 2.4 GHZ radio waves. There really is no reason why you should be concerned by using this 2.4GHZ range in your house.
The only alternatives are laying a cable or using Homeplugs.