I think a step by step building process wouldn't be too bad, maybe you kind of choose what you want to make, have a container or something, you make or find, like a large construction sack, you place a couple of wooden planks down that you've crudely made from a log, into this container sack thing, and then you choose which crude building you want to make from a small option window, and then from there you have to add a few planks or metal sheets, screw, nuts, bolts, or whatever, here and there, for it to start to take shape.
The things I read about base building for DayZ a while ago made it look as though it could work really well, you can electrify a fence with a generator, for immersion purposes....that stops most bolt cutters, you can have razor wire, which, grenades only chuck up in the air and tangle even more in reality...so that stops nade spamming if they stick to immersion, RPGs/LAWs being fired at walls...that's the only issue, unless with each hit, the wall takes on a state of damage and starts warping the metal or splintering the wood, in reality, it would turn the wood into toothpicks, but, yes, it's a game, you can only really go so far, but I would be happy with that kinda set up or mechanic, I think it might fit well, but we'll see what happens, it's a work in progress either way, they'll tweak it, as it goes till it works.
Agreed, DayZ needs to stay the hell away from Arma3 Exile Mods base building mechanics, granted, that's a Mod, and not Bohemia, but still, they might draw some inspiration from it, which I hope they do not.