If this is to be a potential SHTF rifle, I suggest going with the Mini 14 because of ammunition availability. I'm sure 7.62x39 will be available, but I don't know in what quantities.
The Mini 6.8 SPC ammunition is costly and not always available. But it will do the job further out than the 14 or the 30.
What about the Mini 14 as your all around/go to rifle and an inexpensive Bolt action rifle for your varmint/deer getter. There are tons of super cheap bolt guns out there that will do for you.
“If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen.” ― Samuel Adams