If you're going to be rolling out Ubiquiti hardware, do yourself a favor and get setup with Hostifi
They'll spin up a controller for you that is multi tenant. They charge in tiers base on number of devices.
Ubiquiti hardware is just starting to come back into stock, we've been waiting for 48 port both non POE and POE Pro switches...some started arriving this week finally. We keep a big stockroom of Ubiquiti hardware...both Unifi and Edge and air* products.
Not sure where you are in MA, my office is right on 395 just south in Waterford CT....I usually throw away Cloud Keys...may have a few kicking around the office though if you're stuck. But I encourage you to use Hostifi.