Proposal for a Secure Network Architecture

This assignment will explore the secure network architecture for a coffee and tea retailer that is frequented by various users in need of an internet connection. The focus of this proposal will be a recommendation of a design for this type of organization while addressing cost and security concerns. Ultimately, I would recommend a Wide Area Network (WAN) for this type of organization. The data shared below is what I took into consideration before arriving at this decision.
Alternative Architectures
Typically when performing a review of network architecture, most designers review the Local Area Network (LAN) and the Wide Area Network (WAN) diagrams. The LAN consists of a group of computers and supporting devices that share communications line as well as share a server within a particular area (usually one that is geographic). An example of this would be each individual store location having access to their selective network. On the other end of the spectrum is a WAN. A WAN is a wide spread telecommunications network that can span across regional, national or international platforms. This mode of design creates an environment to conduct daily operations within its various locations. A widely used example of the WAN is what the Internet consist of today; multiple users connected all over the world using a single platform.
Pros and Cons of WAN and LAN
When reviewing alternatives, there are always benefits and potential drawbacks of each option. Reviewing alternatives will also allow a further analysis of what network designs consist of and how organizations weigh their decision. Below is a table that outlines the pros and cons of each network design (Differen, 2015):

Local Area Network (LAN)
Wide Area Network (WAN)
Covers
Local Areas
Large Geographic Areas
Speed
High Speed (1000 mbps)
Low Speed (150 mbps)
Data Transfer Rates
High Data Transfer Rates
Low Rates especially when compared to a LAN
Connection
One LAN can be connected to other LANs over any distance via telephone lines and radio waves
Computers connected to a WAN are often connected through public networks, such as the telephone system. They can also be connected through leased lines or satellites.
Ownership
Typically owned, controlled, and managed by a single person or organization
WANs are not owned by any one organization but rather exist under collective or distributed ownership and management over long distances.
Set-Up Cost
If there is a need to set-up extra devices on the network, it’s fairly inexpensive.
Since networks in remote areas have to be connected the set-up costs are higher. However WANs using public networks can be setup very cheaply using software such as a Virtual Private Network (VPN)
Maintenance Cost
Because it covers a relatively small geographical area, LAN is easier to maintain at relatively low costs.
Maintaining WAN is difficult because of its wider geographical coverage and higher maintenance costs.

Security Concerns
Networks run