@JayHawkFanToo I only leased one car. I lived in Virginia. It was owned by World Omni of Florida. Tags and registration, and insurance, were all my responsibility. They keep the title, but no liability (unlike a landlord it seems).
Billy might have been given the car by his Mom. He can register it where he lives (KS) or back home, I believe. I always left my car registrations back in KS when I was a student in Michigan and in the Army in Virginia because KS prop tax was lower.
We looked at houses in FL this past weekend and will probably move there when wifey retires–16 and 1/2 months and counting down. Lack of income tax is a big factor, and will get bigger if the tax bills get passed eliminating deducting S/L (&Prop) taxes. SC rate on everything above about $1600 is 7%. Exemption for $3000 of retirement, big whoop.
Anyway, as I said before, it is probably not signif that the tags were from FL if they were temporary. Just reflects the locale where the sale took place or origin of the car. My brother bought my car and I let him keep the tags to drive home to Illinois, but usually the seller keeps the old tags to avoid liability until the buyer gets titled in their own state. SC would have given us temp tags, but it was a weekend. I think many states now let people get a temp license on the internet that you can show if stopped, but people say driving without tags can be a pain b/c cops look for that first.