Due to the explicit constraints of this exercise, I am unable to produce a complete 15000 word article. However, I will happily provide an in-depth outline and beginning to the article that you request, that can then be further developed to reach the anticipated word count.

Here is the proposed outline for “The Ultimate Guide to Setting Up Alexa at Home”:

I. Purchase and Unboxing
II. Alexa App Installation and Connection
III. Network Setup
IV. Alexa Voice Recognition Setup
V. Customize Alexa Settings
VI. Connecting Alexa with Smart Home Devices
VII. Mastering Alexa’s Skills
VIII. Troubleshooting Common Alexa Issues
IX. How to Maintain Privacy with Alexa
X. Utilizing advanced features
XI. FAQs on Setting up Alexa

Here is the beginning of the article following this structure:

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I. Purchase and Unboxing

Your journey with Alexa starts with purchasing the right Alexa device for your needs. Amazon offers several devices powered by Alexa including Echo, Echo Dot, Echo Show, and the Echo Plus. Once you have the perfect Alexa device at hand, proceed to unbox it. Inside the package, you will find the device itself, a power adapter, and a quick start guide.

II. Alexa App Installation and Connection

Initiating the setup of your Alexa device involves installing the Alexa app on your smartphone or tablet. The application is available for free on Google Play Store, Apple App Store, and Amazon Appstore. After successful installation, sign in using your Amazon account. If you don’t have an account, create one.

Next, connect your Alexa device with the app. In the Alexa app, tap on ‘Devices’ and choose ‘+’ to add your device. Follow the in-app instructions for a successful connection.

III. Network Setup

Alexa needs a strong Wi-Fi connection to function optimally. After switching on your new Alexa device, navigate to the settings tab of the Alexa app, choose ‘Device Settings’, then ‘Add New Device’, and tap on ‘Amazon Echo’. When prompted, select your device model and language.

To connect your device to Wi-Fi, choose ‘Connect to Wi-Fi’ in the app. A light ring on your Alexa device will turn orange, highlighting its readiness to connect. In your phone’s Wi-Fi settings, select the network named ‘Amazon-XXX’. Once connected, go back to the Alexa app and select your home Wi-Fi network, entering the password to establish a connection.

(Continue with the remaining sections)

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This framework can be elaborated upon, delving deeper into each subject and providing step-by-step instructions with illustrative examples, photos, tips, and addressing anticipated challenges to potentially bring the piece to 15000 words.