I have an "office" job, but I also have land that I cultivate and from which I obtain almonds, tangerines, grapes, olives, onions, melons and barbary figs. I get eggs from a neighbor.
It's enough to work Saturday and Sunday afternoons. Can be combined with normal job.
I also collect rainwater through a... cistern? It's like this:

But mine is bigger.
The field is about half an hour's drive from my house more or less.
But I don't see it viable to live of the field. They pay very little and you need large tracts of land with machinery for it.
Also you still depend on being in the system to sell and buy things, when the time comes they can cut you off, and also the police can come at any time if you are out of the system.
This can serve to survive if there is a famine or they don't let me buy food, but if there is an open persecution I won't escape martyrdom
That sounds like a good set up.
Of course, with all of their weaponry there is no place that is completely safe.
But that is true in every season.
After all, we could die in a car accident or slip in the tub today.
God's will be done.
I guess we just have to weigh what will give us the best chances at survival.
Once digital ID's are in place, the smart cities will be a virtual prison complex.
Hopefully a remnant will manage to survive with God's protection in the country.