There are actually the same legal frameworks and products for LTE as well; you can request quotes for an EPC installed on a mini PC and mini eNB in white plastic enclosures with requisite FCC labels. Though, cost and performance were not highly competitive relative to Wi-Fi. Starting from couple thousands of dollars or so.
You have to buy your own base station. Its for IoT, factory automation, home use. 5G small cell architecture.
I remember hearing that some conference at some point did its own 4G network with its own SIM cards. They had gotten permission to use licensed spectrum for the duration of the event. Unfortunately, I do not remember which conference. If I did, I would look at what they said about how they got the SIM cards for it.
If you only need Wifi, you should not invent reasons not to get 5G station.
These unlicensed frequencies combine the benefits of Wi-Fi and 5G together.