10, 40 and 100 Gbit/s are common fiber speeds (as in, you can buy standardized parts from multiple vendors), but at least 100GbE is properly expensive (something in my brain says +100k€ per interface, but that figure probably is a few years old). And that's per individual fiberpair & wavelength, so it is easy to bundle up multiple channels.

I assume the quoted wireless speeds are for a single client under perfect conditions, what summed up bandwidth can a single tower support with multiple clients? 10 or 40G probably go a long way already.