Building owner who leases out multiple offices that would like to offer internet access to each leased office with full control of addressing, user use, and bandwidth control for each office. Easy to manage, offices would supply there own switches.
Must be cost effective with a good return of the investment.
1 Compaq Proliant 8500 with multiple nics. (Old but still very useful!)
Pfsense firewall software. ( Previously used on on other commercial sites with great success.)
Inexpensive with the power of supplying multiple areas each with there own subnet, quantity of users and bandwidth control of each area.