For home / SOHO never rely on that attractive sweet idea of wifi.
Cables are very good and cheap, only labour a bit costly. Pull CAT 5e wires to every room (@2pair [1 spare]).
Do so when you renovate or do electrical / telco wires. Any DSL/CATV/Fiber from outside enters home to a common router point where there is power outlet. Then from there pull CAT 5e wire to every Desk / Rm 2 pairs each.
That's it.
Wifi are NG & unsafe. Any transactions can be captured and recorded and decoded into clear info by EVERYONE, 100%. Including security passwords & emails. Wifi means no privacy, regardless which encryption key method.
Software Tools (Wire Shark Back Track etc) can listen to everything on the air, with victims totally unaware, and record down each and every encrypted packages of data into a file, and filter out to narrow to interesting target, and run a key crack over the data, and 100% of the data will become readable very soon. Even children knows how to do it.
hundreds of these how-to videos are on youtube and children are all watching. I did not watch any of these, but just random picked to show you some examples:
<iframe width="420" height="315" src="http://www.youtube.com/embed/3P8l-PsvYak" frameborder="0" allowfullscreen></iframe>
<iframe width="420" height="315" src="http://www.youtube.com/embed/2kFpAwDzBAQ" frameborder="0" allowfullscreen></iframe>
<iframe width="420" height="315" src="http://www.youtube.com/embed/Zor7celUF7c" frameborder="0" allowfullscreen></iframe>
<iframe width="420" height="315" src="http://www.youtube.com/embed/i3tympf6n2w" frameborder="0" allowfullscreen></iframe>
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