This is from the ad I have seen. Can this not be just created by yourself instead of paying this individual who is selling it on a hard drive preconfigured?

Start of ad:

Bitcoin Namecoin Litecoin Dogecoin Merged Mining Pool used mining pool.
Brand new custom programmed pool. Mine multiple coins at one time as a result earning more money. Stop paying high pool fees and earn them yourself. First of all, in addition mining on other pools you lose the transaction fees. Therefore by owning your own pool you get to keep it. Transaction fees are between 3 to as much as over 5 Bitcoin on each block solved. “Big Money”. Make money now by running your own private or public mining pool server. Everything you need to run your own mining pool for “Big Profits”.

The SSD comes configured to your network with your IP address and is plug and play ready. Your own professional mining pool. Configured and also supported, shipped to your door ready to install in minutes and begin pointing your workers to it.

Pool Features

Bitcoin Mining Pool
Litecoin Mining Pool
Merged Namecoin
Merged Dogecoin
Fully re-written GUI with Smarty templates
Full file based template support
VAR-DIFF Integration
Reward Systems
PPLNS
PROP
PPS
New Themes
BRAND NEW Live Dashboard Interface
AJAX Support
Overhauled API
Scale Web
Bootstrap
Web User accounts
Re-Captcha protected registration form
Worker accounts
Worker activity Worker hash-rates
Pool statistics
Block statistics
Pool donations, bonuses, fees and block bonuses
Manual and auto payout
Transaction list
Admin Panel
Cron Monitoring Overview
User Listing including statistics
Wallet information
User Transactions
News
Posts
Pool Settings
Pool Workers
User Reports
Notification systems
IDLE Workers
New blocks found in pool
Auto Payout
Manual Payouts

Mining pools are a way for miners to share pool resources. Therefore all together they add hashing power and as a result they solve blocks faster.

Shares also are awarded to members of the Bitcoin mining pool who present whats called “proof of work”.

As a result the solution to this problem was for miners to pool their resources together. Now hence they could generate blocks quicker and in conclusion receive a portion of the Bitcoin block reward faster.
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So my question is, why would they be selling this for over $6000 alone minus the hard drive being used to host the pool is a ssd which would be around $450 for one?

And how much space would be needed available on a drive to start a mining pool for these various coins?
The one he stated in his ad is a 1TB ssd.

Any help with this would be appreciated since I am brand new to how mining pools work.
This ad just struck me as odd as anyone can just download the required databases/pools and set this up on their own. And just spend $450-500 on the drive and save themselves of paying the asking price from this seller is wanting for the work he has done for you to start one for your own.

Thank you.