Define what you want to achieve with the radio before going any further. If you just want entertainment there are many cheaper and easier ways to do it. If you want to reach specific people at specific places or have a SHTF communication plan that is good to specify.
Discussion
Emergency uses are definitely an interest (among the top). I have a co-worker I'd like to speak with, but I'm also interested in the technology in general.
Look up S2 underground and the JS8Call protocol. It is a digital mode where each computer/radio is like a relay node. Works really well on lower power and with lots of interference. You can also reach the whole US for less than 1000USFiat. I actually listed a kit for sale on the Nostr marketplace to do this but it is going for low price point. Legally it also requires a General License to do HF. What does your buddy have for radio equipment?
I'm unsure of what he has specifically, but I am reaching out to find out more.
Let me know. I struggled trying to find info because some Hams think they are keepers of the holy Grail and won't help you until you pass an arbitrary test that doesn't teach you how to set up and operate a radio. The test is just to make sure you follow government rules to use "their" airwaves and there is a bit of basic electrical safety also.
FYI, 
Thank you for the attempted zap. Apparently strike and amethyst combo have a 100 sat minimum unless sending strike to strike.
Weird.
Yea. I reached out to strike and they said they don't have any limits. Maybe I messed something up setting up my amethyst app. I'll have to go check.
I suppose I want to transmit rather than just receive. To what level is still beyond the scope of my understanding. It feels like something I'll want to go all in on though because of how interested I am right now. That's usually a sign of a successful endeavor for me. Basically, I'm game for spending a lot of time and money going deep if you have those sorts of recommendations.
How far do you want to reach and who will be receiving your transmits and what is your budget? Do you have room for a 40 to 60 foot tall antenna or do you have room to stretch a wire out 150 ft? Do you want to do voice or do you want to treat it like a relay node and use digital?