Just be aware that even though you can have multiple vehicles with the same radio operator plate, it can cause minor difficulties for you.
Based on my experiences...
Law enforcement officials may not notice that you have more than one with same plate. That may result in a traffic stop, mostly in smaller towns, thinking your plates were stolen. (Only happened to me twice in the past 30 years, but still, it happened. )
Annual Renewal notices may not happen. You may need to visit a county tax / license branch in person to renew.
I've got 2 vehicles with my call sign plates. When I added the 2nd vehicle in January 2017, the state quit sending me renewal notices by mail for either vehicle.
When I was involved in a minor accident 2 months ago, SAPD officer said my plates were showing up as not valid, even though I had just renewed them the week before. I still need to visit tgr Bexar County Tax Assessor ofc to see what the story is about that.
And finally, you are somewhat surrendering your privacy because Amateur Radio Callsigns are public information and can be researched via Google online, etc.. Fortunately most non-hams do not know this. Hehe.
San Antonio TX
Sent: Sat, 30 Mar 2019 5:21 PM
Subject: [W5SC] saradioclub #facebook