Is this one of the best way to setup wifi in a medium to large size house?

Is this one of the best way to setup wifi in a medium to large size house?

I need to setup outdoor and indoor WIFI in a two level building about 4,000 sqft with multiple blind spot; in addition there is pool Pump that need to be connected to WIFI.
 I am planning to use one of these powerlines, one in closet where the router located and one close to outside door to pool area and one for upstairs (Total of three powerlines).  And then connect network extender or access point on each location.
 Please advise if I should configure multiple access point with the same SSID or not, if you have used or suggest something else.

 Powerline AV 200
 Netgear Powerline Av 200 Wireless-N Extender Kit
 D-Link DHP-1320 Wireless N PowerLine Router, and the WD Livewire Powerline AV Network Kit.
 ZyXel PLA4231 500 Mbps Powerline Wireless N Extender
 Trendnet Powerline 500 AV Nano Adapter Kit
 D-Link DHP-501AV PowerLine AV 500 Adapter Starter Kit.
 Thank you
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William FulksSystems Analyst & WebmasterCommented:
Using multiple access points never hurt but it's really hard to tell without being there to measure performance. You never know how the signal will work through walls and other obstructions. At the very least, I'd say you'd need to put in two of them.

When you set them up, use the same SSID, security type, and password, but make sure each one is on a different channel. The channel option is key to making your connected devices use the one with the best signal.

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There are some professional (and expensive) solutions, with some acesspoints connected by wires with a controller which decide which accesspoint can provide the optimal signal, can do loading balancing , up to 200 concurent wireless devices and other crazy stuffs

If you are interested I can send you some links
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Wireless Networking

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