Hertz Car Rental Location at FCO with Mobility Issues

HI,

We are looking at renting a car at FCO, but the location of the parking garage where the rental cars are look very difficult for us to reach from Terminal 3. We are not wheelchair bound, but cannot cover much distance without having to stop and rest. I understand there are moving sidewalks in the skyway across from the Terminal to help move you. How difficult is it to get there and is there another option, like internal airport shuttle to take you there?

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:
https://bit.ly/2wAelg8
Advids Overview

Thank you.