CBs are cheap and common. There's very few people using them these days, but JILLIONS of people still have one or more stashed-away. It wouldn't hurt to have an RF amplifier to make that 5 mile range more of a certainty. But I predict that they'll be pressed into service in the event of a strong EMP.
For more reliability and range options, I would look into some of the newer HF/VHF/UHF, all-mode amateur radios. Most can be opened-up to go ANYWHERE, and there's usually a band-opening on one, or more bands when 11 meters has "gone long". With "modifications", some of them are also capable of using the GMRS bands too (which many people currently have).
Look into getting your ham ticket. There are test prep apps and sites available online these days, and many local amateur radio clubs that will be happy to guide you to success.
ALL license levels are relatively easy to pass. And even in an SHTF scenario, the license is still quite useful as t-paper.

That's just my way of saying, "
just get the stinkin rig first and learn how to use it"...
THEN get your ticket whenever time permits. You know --- "Priorities".
I know this emergency power trailer is FUGLY, but it's a "work in-progress";