Other rental companies do allow one or more add'l non-spouse drivers for free.
If you use the
AAA code, any AAA member is an authorized additional driver at Hertz.
If you use the Costco code, one add'l driver is free at
Alamo. Also at Alamo, if you are retired military, use the RM code and there is no limit on add'l drivers.
My insurance company is USAA, and any other driver insured through USAA is free from
Avis or Hertz.
If you are over 50, join the Dollar Silver Doller Club, and one add'l driver is free.
You have to shop carefully because sometimes the rate that includes the free driver is more than the cost of just paying for the add'l driver.
Also, is can be hard to even figure out how much that add'l driver is going to cost you. Alamo probably has the best web site for this because it allows you to get a total price with as many drivers as you need. For many others, you will need to call the company. I beleive that at MCO National is $5/day, Alamo is $5/day and Avis is $25/rental period. All of this could change before your trip, of course.
Best of luck in making your decision. -- Suzanne