I’m not aware of any unlimited Verizon hotspot plans. Is this an old grandfathered plan? Any plan Verizon currently sells is unlimited on the device itself. Hotspot and “phone as a modem” has a data cap then throttling. There are unofficial methods to get around this, of course, but there is zero chance of outright buying a Verizon unlimited hotspot plan unless it’s Hum for RV. And even that shuts off after the vehicle is inactive, so I’m told
My AT&T hotspot is on their "Connected Car" unlimited 4G/LTE plan at $22.01/mo. That plan is no longer offered, but I'm grandfathered in. My two Verizon hotspots are "graymarket" flashed devices that have unlimited 3G for $5/month. Those serve as a backup in case we're in a location with a poor AT&T cell signal. That covers our motorhome Internet services. At our Adirondack vacation cottage where we have a second Hopper w/Sling, we have an unlimited data "seniors" 30 GB cable plan from Spectrum at $14.99/mo. That makes our total per month Internet costs including all taxes and fees exactly $47 with unlimited data all around.
I should add that none of our plans are "throttled", although the Connected Car plan is subject to "deprioritization" after the first 22GB where our speeds can be lowered during busy periods on congested towers. So far, if that's happened, we haven't noticed it.